/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:37:04,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:37:04,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:37:04,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:37:04,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:37:04,189 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:37:04,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:37:04,189 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:37:04,190 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:37:04,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:37:04,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:37:04,191 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:37:04,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:37:04,191 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:37:04,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:37:04,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:37:04,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:37:04,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:37:04,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:37:04,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:37:04,192 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:37:04,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:37:04,192 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:37:04,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:37:04,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:37:04,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:37:04,192 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:37:04,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:37:04,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:37:04,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:37:04,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:37:04,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:37:04,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:37:04,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:37:04,193 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:37:04,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:37:04,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:37:04,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:37:04,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:37:04,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:37:04,402 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:37:04,403 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:37:04,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl [2021-07-09 17:37:04,403 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl' [2021-07-09 17:37:04,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:37:04,442 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:37:04,443 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:37:04,443 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:37:04,443 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:37:04,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:37:04" (1/1) ... [2021-07-09 17:37:04,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:37:04" (1/1) ... [2021-07-09 17:37:04,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:37:04,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:37:04,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:37:04,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:37:04,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:37:04" (1/1) ... [2021-07-09 17:37:04,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:37:04" (1/1) ... [2021-07-09 17:37:04,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:37:04" (1/1) ... [2021-07-09 17:37:04,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:37:04" (1/1) ... [2021-07-09 17:37:04,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:37:04" (1/1) ... [2021-07-09 17:37:04,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:37:04" (1/1) ... [2021-07-09 17:37:04,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:37:04" (1/1) ... [2021-07-09 17:37:04,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:37:04,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:37:04,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:37:04,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:37:04,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:37:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:37:04,544 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:37:04,544 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:37:04,545 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:37:04,545 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:37:04,545 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:37:04,545 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:37:04,545 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:37:04,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:37:04,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:37:04,546 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:37:04,546 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:37:04,547 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:37:04,547 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:37:04,891 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:37:04,891 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-07-09 17:37:04,892 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:37:04 BoogieIcfgContainer [2021-07-09 17:37:04,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:37:04,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:37:04,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:37:04,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:37:04,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:37:04" (1/2) ... [2021-07-09 17:37:04,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@525b183c and model type nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:37:04, skipping insertion in model container [2021-07-09 17:37:04,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:37:04" (2/2) ... [2021-07-09 17:37:04,897 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-trans.wvr.bpl [2021-07-09 17:37:04,900 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:37:04,901 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:37:04,901 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:37:04,901 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:37:04,929 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 17:37:04,942 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 17:37:04,954 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:37:04,955 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:37:04,955 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:37:04,955 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:37:04,955 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:37:04,955 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:37:04,955 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:37:04,955 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:37:04,961 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2021-07-09 17:37:04,975 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:04,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:04,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:37:04,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:04,983 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:04,983 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:04,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:04,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1464802926, now seen corresponding path program 1 times [2021-07-09 17:37:04,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:04,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658974274] [2021-07-09 17:37:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:05,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:05,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658974274] [2021-07-09 17:37:05,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658974274] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:37:05,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:37:05,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:37:05,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902284849] [2021-07-09 17:37:05,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:37:05,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:05,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:37:05,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:37:05,165 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 3.4953271028037385) internal successors, (374), 107 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:05,290 INFO L93 Difference]: Finished difference Result 265 states and 821 transitions. [2021-07-09 17:37:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:37:05,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:37:05,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:05,300 INFO L225 Difference]: With dead ends: 265 [2021-07-09 17:37:05,300 INFO L226 Difference]: Without dead ends: 250 [2021-07-09 17:37:05,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:37:05,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-07-09 17:37:05,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 126. [2021-07-09 17:37:05,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.368) internal successors, (421), 125 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2021-07-09 17:37:05,334 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2021-07-09 17:37:05,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:05,334 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2021-07-09 17:37:05,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2021-07-09 17:37:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:37:05,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:05,336 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:05,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:37:05,336 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:05,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:05,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1812136636, now seen corresponding path program 2 times [2021-07-09 17:37:05,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:05,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884697677] [2021-07-09 17:37:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:05,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:05,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884697677] [2021-07-09 17:37:05,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884697677] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:37:05,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:37:05,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:37:05,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804057542] [2021-07-09 17:37:05,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:37:05,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:05,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:37:05,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:37:05,408 INFO L87 Difference]: Start difference. First operand 126 states and 421 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:05,525 INFO L93 Difference]: Finished difference Result 321 states and 1029 transitions. [2021-07-09 17:37:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:37:05,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:37:05,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:05,528 INFO L225 Difference]: With dead ends: 321 [2021-07-09 17:37:05,528 INFO L226 Difference]: Without dead ends: 306 [2021-07-09 17:37:05,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:37:05,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-07-09 17:37:05,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 132. [2021-07-09 17:37:05,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.312977099236641) internal successors, (434), 131 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2021-07-09 17:37:05,538 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2021-07-09 17:37:05,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:05,538 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2021-07-09 17:37:05,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2021-07-09 17:37:05,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:37:05,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:05,540 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:05,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:37:05,540 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:05,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:05,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1857974612, now seen corresponding path program 3 times [2021-07-09 17:37:05,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:05,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018451676] [2021-07-09 17:37:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:05,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:05,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018451676] [2021-07-09 17:37:05,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018451676] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:37:05,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:37:05,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:37:05,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494251608] [2021-07-09 17:37:05,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:37:05,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:05,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:37:05,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:37:05,637 INFO L87 Difference]: Start difference. First operand 132 states and 434 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:05,745 INFO L93 Difference]: Finished difference Result 261 states and 774 transitions. [2021-07-09 17:37:05,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:37:05,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:37:05,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:05,748 INFO L225 Difference]: With dead ends: 261 [2021-07-09 17:37:05,750 INFO L226 Difference]: Without dead ends: 246 [2021-07-09 17:37:05,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:37:05,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-07-09 17:37:05,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 140. [2021-07-09 17:37:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-07-09 17:37:05,771 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-07-09 17:37:05,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:05,771 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-07-09 17:37:05,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,771 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-07-09 17:37:05,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:37:05,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:05,774 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:05,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:37:05,774 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:05,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:05,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1906157040, now seen corresponding path program 4 times [2021-07-09 17:37:05,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:05,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130100789] [2021-07-09 17:37:05,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:05,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:05,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130100789] [2021-07-09 17:37:05,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130100789] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:37:05,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:37:05,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:37:05,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279092158] [2021-07-09 17:37:05,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:37:05,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:05,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:37:05,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:37:05,896 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:05,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:05,998 INFO L93 Difference]: Finished difference Result 264 states and 776 transitions. [2021-07-09 17:37:05,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:37:05,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:37:05,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:06,000 INFO L225 Difference]: With dead ends: 264 [2021-07-09 17:37:06,000 INFO L226 Difference]: Without dead ends: 249 [2021-07-09 17:37:06,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:37:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-09 17:37:06,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 140. [2021-07-09 17:37:06,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-07-09 17:37:06,009 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-07-09 17:37:06,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:06,009 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-07-09 17:37:06,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,009 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-07-09 17:37:06,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:37:06,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:06,011 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:06,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:37:06,011 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:06,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:06,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1941149522, now seen corresponding path program 5 times [2021-07-09 17:37:06,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:06,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087675920] [2021-07-09 17:37:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:06,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:06,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087675920] [2021-07-09 17:37:06,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087675920] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:37:06,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:37:06,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:37:06,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712590728] [2021-07-09 17:37:06,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:37:06,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:06,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:37:06,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:37:06,111 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:06,304 INFO L93 Difference]: Finished difference Result 229 states and 668 transitions. [2021-07-09 17:37:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:37:06,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:37:06,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:06,305 INFO L225 Difference]: With dead ends: 229 [2021-07-09 17:37:06,305 INFO L226 Difference]: Without dead ends: 214 [2021-07-09 17:37:06,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:37:06,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-07-09 17:37:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 142. [2021-07-09 17:37:06,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-07-09 17:37:06,310 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-07-09 17:37:06,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:06,310 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-07-09 17:37:06,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,310 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-07-09 17:37:06,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:37:06,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:06,311 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:06,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:37:06,311 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:06,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:06,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1674927890, now seen corresponding path program 6 times [2021-07-09 17:37:06,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:06,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186949093] [2021-07-09 17:37:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:06,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:06,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186949093] [2021-07-09 17:37:06,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186949093] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:37:06,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:37:06,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:37:06,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783130753] [2021-07-09 17:37:06,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:37:06,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:06,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:37:06,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:37:06,398 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:06,636 INFO L93 Difference]: Finished difference Result 336 states and 1030 transitions. [2021-07-09 17:37:06,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:37:06,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:37:06,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:06,638 INFO L225 Difference]: With dead ends: 336 [2021-07-09 17:37:06,638 INFO L226 Difference]: Without dead ends: 321 [2021-07-09 17:37:06,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:37:06,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-09 17:37:06,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 142. [2021-07-09 17:37:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-07-09 17:37:06,644 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-07-09 17:37:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:06,644 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-07-09 17:37:06,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,645 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-07-09 17:37:06,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:37:06,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:06,645 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:06,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 17:37:06,646 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:06,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:06,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1841090398, now seen corresponding path program 1 times [2021-07-09 17:37:06,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:06,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436058993] [2021-07-09 17:37:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:06,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:06,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436058993] [2021-07-09 17:37:06,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436058993] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:37:06,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:37:06,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:37:06,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614965223] [2021-07-09 17:37:06,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:37:06,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:06,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:37:06,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:37:06,660 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:06,664 INFO L93 Difference]: Finished difference Result 166 states and 549 transitions. [2021-07-09 17:37:06,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:37:06,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:37:06,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:06,666 INFO L225 Difference]: With dead ends: 166 [2021-07-09 17:37:06,666 INFO L226 Difference]: Without dead ends: 166 [2021-07-09 17:37:06,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:37:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-09 17:37:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-07-09 17:37:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.327272727272727) internal successors, (549), 165 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 549 transitions. [2021-07-09 17:37:06,670 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 549 transitions. Word has length 15 [2021-07-09 17:37:06,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:06,670 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 549 transitions. [2021-07-09 17:37:06,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 549 transitions. [2021-07-09 17:37:06,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:37:06,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:06,671 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:06,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 17:37:06,671 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:06,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:06,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1865004024, now seen corresponding path program 1 times [2021-07-09 17:37:06,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:06,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110139611] [2021-07-09 17:37:06,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:06,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:06,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110139611] [2021-07-09 17:37:06,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110139611] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:37:06,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:37:06,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:37:06,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760868988] [2021-07-09 17:37:06,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:37:06,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:06,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:37:06,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:37:06,685 INFO L87 Difference]: Start difference. First operand 166 states and 549 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:06,689 INFO L93 Difference]: Finished difference Result 192 states and 636 transitions. [2021-07-09 17:37:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:37:06,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:37:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:06,690 INFO L225 Difference]: With dead ends: 192 [2021-07-09 17:37:06,691 INFO L226 Difference]: Without dead ends: 192 [2021-07-09 17:37:06,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:37:06,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-07-09 17:37:06,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-07-09 17:37:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 3.329842931937173) internal successors, (636), 191 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 636 transitions. [2021-07-09 17:37:06,695 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 636 transitions. Word has length 15 [2021-07-09 17:37:06,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:06,696 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 636 transitions. [2021-07-09 17:37:06,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,696 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 636 transitions. [2021-07-09 17:37:06,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:37:06,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:06,696 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:06,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 17:37:06,697 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:06,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:06,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1029743448, now seen corresponding path program 1 times [2021-07-09 17:37:06,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:06,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036128486] [2021-07-09 17:37:06,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:06,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:06,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036128486] [2021-07-09 17:37:06,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036128486] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:37:06,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:37:06,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:37:06,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165693144] [2021-07-09 17:37:06,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:37:06,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:06,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:37:06,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:37:06,710 INFO L87 Difference]: Start difference. First operand 192 states and 636 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:06,714 INFO L93 Difference]: Finished difference Result 223 states and 739 transitions. [2021-07-09 17:37:06,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:37:06,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:37:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:06,716 INFO L225 Difference]: With dead ends: 223 [2021-07-09 17:37:06,716 INFO L226 Difference]: Without dead ends: 223 [2021-07-09 17:37:06,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:37:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-07-09 17:37:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-07-09 17:37:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.328828828828829) internal successors, (739), 222 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 739 transitions. [2021-07-09 17:37:06,721 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 739 transitions. Word has length 15 [2021-07-09 17:37:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:06,722 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 739 transitions. [2021-07-09 17:37:06,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 739 transitions. [2021-07-09 17:37:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:37:06,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:06,723 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:06,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 17:37:06,723 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:06,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:06,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1929878260, now seen corresponding path program 1 times [2021-07-09 17:37:06,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:06,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936286813] [2021-07-09 17:37:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:06,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:06,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936286813] [2021-07-09 17:37:06,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936286813] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:37:06,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:37:06,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:37:06,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060161622] [2021-07-09 17:37:06,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:37:06,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:06,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:37:06,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:37:06,758 INFO L87 Difference]: Start difference. First operand 223 states and 739 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:06,790 INFO L93 Difference]: Finished difference Result 414 states and 1238 transitions. [2021-07-09 17:37:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:37:06,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:37:06,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:06,792 INFO L225 Difference]: With dead ends: 414 [2021-07-09 17:37:06,792 INFO L226 Difference]: Without dead ends: 366 [2021-07-09 17:37:06,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:37:06,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-09 17:37:06,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 223. [2021-07-09 17:37:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.3063063063063063) internal successors, (734), 222 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 734 transitions. [2021-07-09 17:37:06,798 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 734 transitions. Word has length 16 [2021-07-09 17:37:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:06,799 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 734 transitions. [2021-07-09 17:37:06,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 734 transitions. [2021-07-09 17:37:06,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:37:06,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:06,799 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:06,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-09 17:37:06,800 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:06,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:06,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2009804370, now seen corresponding path program 1 times [2021-07-09 17:37:06,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:06,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899889638] [2021-07-09 17:37:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:06,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:06,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899889638] [2021-07-09 17:37:06,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899889638] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:37:06,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:37:06,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:37:06,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048670849] [2021-07-09 17:37:06,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:37:06,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:06,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:37:06,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:37:06,825 INFO L87 Difference]: Start difference. First operand 223 states and 734 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:06,891 INFO L93 Difference]: Finished difference Result 571 states and 1740 transitions. [2021-07-09 17:37:06,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:37:06,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:37:06,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:06,894 INFO L225 Difference]: With dead ends: 571 [2021-07-09 17:37:06,894 INFO L226 Difference]: Without dead ends: 495 [2021-07-09 17:37:06,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:37:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-09 17:37:06,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 233. [2021-07-09 17:37:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 3.2456896551724137) internal successors, (753), 232 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 753 transitions. [2021-07-09 17:37:06,901 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 753 transitions. Word has length 16 [2021-07-09 17:37:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:06,901 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 753 transitions. [2021-07-09 17:37:06,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,901 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 753 transitions. [2021-07-09 17:37:06,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:37:06,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:06,901 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:06,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-09 17:37:06,902 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:06,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:06,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1844211202, now seen corresponding path program 2 times [2021-07-09 17:37:06,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:06,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776325194] [2021-07-09 17:37:06,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:06,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:06,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776325194] [2021-07-09 17:37:06,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776325194] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:37:06,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:37:06,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:37:06,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083348275] [2021-07-09 17:37:06,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:37:06,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:06,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:37:06,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:37:06,919 INFO L87 Difference]: Start difference. First operand 233 states and 753 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:06,930 INFO L93 Difference]: Finished difference Result 347 states and 1054 transitions. [2021-07-09 17:37:06,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:37:06,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:37:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:06,931 INFO L225 Difference]: With dead ends: 347 [2021-07-09 17:37:06,931 INFO L226 Difference]: Without dead ends: 283 [2021-07-09 17:37:06,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:37:06,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-09 17:37:06,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-07-09 17:37:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.2620087336244543) internal successors, (747), 229 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 747 transitions. [2021-07-09 17:37:06,936 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 747 transitions. Word has length 16 [2021-07-09 17:37:06,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:06,936 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 747 transitions. [2021-07-09 17:37:06,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:06,937 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 747 transitions. [2021-07-09 17:37:06,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:37:06,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:06,937 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:06,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-09 17:37:06,937 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:06,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:06,938 INFO L82 PathProgramCache]: Analyzing trace with hash -2095449492, now seen corresponding path program 1 times [2021-07-09 17:37:06,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:06,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035427813] [2021-07-09 17:37:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:06,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:06,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035427813] [2021-07-09 17:37:06,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035427813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:06,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674939639] [2021-07-09 17:37:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:07,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:37:07,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:07,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674939639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:07,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:07,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-07-09 17:37:07,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773577859] [2021-07-09 17:37:07,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:37:07,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:07,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:37:07,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:37:07,094 INFO L87 Difference]: Start difference. First operand 230 states and 747 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:07,174 INFO L93 Difference]: Finished difference Result 529 states and 1519 transitions. [2021-07-09 17:37:07,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:37:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:37:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:07,177 INFO L225 Difference]: With dead ends: 529 [2021-07-09 17:37:07,177 INFO L226 Difference]: Without dead ends: 455 [2021-07-09 17:37:07,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:37:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-07-09 17:37:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 240. [2021-07-09 17:37:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1380753138075312) internal successors, (750), 239 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 750 transitions. [2021-07-09 17:37:07,185 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 750 transitions. Word has length 16 [2021-07-09 17:37:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:07,185 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 750 transitions. [2021-07-09 17:37:07,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 750 transitions. [2021-07-09 17:37:07,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:37:07,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:07,186 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:07,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 17:37:07,405 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:07,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:07,406 INFO L82 PathProgramCache]: Analyzing trace with hash 364875434, now seen corresponding path program 3 times [2021-07-09 17:37:07,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:07,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435639088] [2021-07-09 17:37:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:07,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:07,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435639088] [2021-07-09 17:37:07,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435639088] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:37:07,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:37:07,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:37:07,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598862007] [2021-07-09 17:37:07,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:37:07,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:07,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:37:07,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:37:07,420 INFO L87 Difference]: Start difference. First operand 240 states and 750 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:07,436 INFO L93 Difference]: Finished difference Result 335 states and 978 transitions. [2021-07-09 17:37:07,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:37:07,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:37:07,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:07,437 INFO L225 Difference]: With dead ends: 335 [2021-07-09 17:37:07,437 INFO L226 Difference]: Without dead ends: 263 [2021-07-09 17:37:07,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:37:07,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-07-09 17:37:07,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 234. [2021-07-09 17:37:07,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 3.0257510729613735) internal successors, (705), 233 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 705 transitions. [2021-07-09 17:37:07,442 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 705 transitions. Word has length 16 [2021-07-09 17:37:07,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:07,442 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 705 transitions. [2021-07-09 17:37:07,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,443 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 705 transitions. [2021-07-09 17:37:07,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:37:07,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:07,443 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:07,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-09 17:37:07,443 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:07,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:07,444 INFO L82 PathProgramCache]: Analyzing trace with hash -792720916, now seen corresponding path program 2 times [2021-07-09 17:37:07,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:07,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851517285] [2021-07-09 17:37:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:07,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:07,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851517285] [2021-07-09 17:37:07,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851517285] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:37:07,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:37:07,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:37:07,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607089209] [2021-07-09 17:37:07,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:37:07,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:07,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:37:07,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:37:07,459 INFO L87 Difference]: Start difference. First operand 234 states and 705 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:07,470 INFO L93 Difference]: Finished difference Result 314 states and 885 transitions. [2021-07-09 17:37:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:37:07,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:37:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:07,472 INFO L225 Difference]: With dead ends: 314 [2021-07-09 17:37:07,472 INFO L226 Difference]: Without dead ends: 244 [2021-07-09 17:37:07,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:37:07,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-09 17:37:07,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 213. [2021-07-09 17:37:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.9669811320754715) internal successors, (629), 212 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 629 transitions. [2021-07-09 17:37:07,477 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 629 transitions. Word has length 16 [2021-07-09 17:37:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:07,477 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 629 transitions. [2021-07-09 17:37:07,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 629 transitions. [2021-07-09 17:37:07,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:37:07,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:07,477 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:07,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-09 17:37:07,478 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:07,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:07,478 INFO L82 PathProgramCache]: Analyzing trace with hash -507279316, now seen corresponding path program 2 times [2021-07-09 17:37:07,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:07,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390955953] [2021-07-09 17:37:07,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:07,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:07,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390955953] [2021-07-09 17:37:07,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390955953] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:37:07,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:37:07,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:37:07,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222141125] [2021-07-09 17:37:07,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:37:07,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:07,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:37:07,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:37:07,499 INFO L87 Difference]: Start difference. First operand 213 states and 629 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:07,515 INFO L93 Difference]: Finished difference Result 281 states and 773 transitions. [2021-07-09 17:37:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:37:07,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:37:07,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:07,516 INFO L225 Difference]: With dead ends: 281 [2021-07-09 17:37:07,516 INFO L226 Difference]: Without dead ends: 240 [2021-07-09 17:37:07,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:37:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-09 17:37:07,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 209. [2021-07-09 17:37:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.985576923076923) internal successors, (621), 208 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 621 transitions. [2021-07-09 17:37:07,521 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 621 transitions. Word has length 16 [2021-07-09 17:37:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:07,521 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 621 transitions. [2021-07-09 17:37:07,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 621 transitions. [2021-07-09 17:37:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:37:07,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:07,522 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:07,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-09 17:37:07,522 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:07,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:07,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1232360210, now seen corresponding path program 3 times [2021-07-09 17:37:07,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:07,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726349910] [2021-07-09 17:37:07,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:07,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:07,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726349910] [2021-07-09 17:37:07,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726349910] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:37:07,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:37:07,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:37:07,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972492015] [2021-07-09 17:37:07,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:37:07,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:07,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:37:07,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:37:07,544 INFO L87 Difference]: Start difference. First operand 209 states and 621 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:07,572 INFO L93 Difference]: Finished difference Result 238 states and 670 transitions. [2021-07-09 17:37:07,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:37:07,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 17:37:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:07,574 INFO L225 Difference]: With dead ends: 238 [2021-07-09 17:37:07,574 INFO L226 Difference]: Without dead ends: 189 [2021-07-09 17:37:07,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:37:07,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-07-09 17:37:07,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-07-09 17:37:07,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-07-09 17:37:07,578 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 16 [2021-07-09 17:37:07,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:07,578 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-07-09 17:37:07,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:07,578 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-07-09 17:37:07,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:07,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:07,579 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:07,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-07-09 17:37:07,579 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:07,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:07,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1392682474, now seen corresponding path program 1 times [2021-07-09 17:37:07,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:07,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089020377] [2021-07-09 17:37:07,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:07,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:07,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089020377] [2021-07-09 17:37:07,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089020377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:07,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490077885] [2021-07-09 17:37:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:07,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:07,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:08,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490077885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:08,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:08,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-07-09 17:37:08,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6584407] [2021-07-09 17:37:08,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:08,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:08,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:08,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:08,032 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:09,143 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-07-09 17:37:09,304 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-07-09 17:37:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:09,473 INFO L93 Difference]: Finished difference Result 577 states and 1611 transitions. [2021-07-09 17:37:09,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:37:09,474 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:09,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:09,476 INFO L225 Difference]: With dead ends: 577 [2021-07-09 17:37:09,476 INFO L226 Difference]: Without dead ends: 486 [2021-07-09 17:37:09,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1425.8ms TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:37:09,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-09 17:37:09,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 243. [2021-07-09 17:37:09,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.9545454545454546) internal successors, (715), 242 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:09,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 715 transitions. [2021-07-09 17:37:09,483 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 715 transitions. Word has length 20 [2021-07-09 17:37:09,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:09,483 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 715 transitions. [2021-07-09 17:37:09,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:09,483 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 715 transitions. [2021-07-09 17:37:09,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:09,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:09,484 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:09,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 17:37:09,700 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:09,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:09,700 INFO L82 PathProgramCache]: Analyzing trace with hash 56489052, now seen corresponding path program 2 times [2021-07-09 17:37:09,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:09,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798124895] [2021-07-09 17:37:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:09,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:09,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798124895] [2021-07-09 17:37:09,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798124895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:09,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660493330] [2021-07-09 17:37:09,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:09,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:09,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:09,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:09,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:10,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660493330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:10,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:10,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-07-09 17:37:10,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135160223] [2021-07-09 17:37:10,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:37:10,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:10,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:37:10,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:10,104 INFO L87 Difference]: Start difference. First operand 243 states and 715 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:11,330 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-07-09 17:37:11,628 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-07-09 17:37:12,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:12,175 INFO L93 Difference]: Finished difference Result 801 states and 2205 transitions. [2021-07-09 17:37:12,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:37:12,175 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:12,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:12,177 INFO L225 Difference]: With dead ends: 801 [2021-07-09 17:37:12,177 INFO L226 Difference]: Without dead ends: 633 [2021-07-09 17:37:12,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1915.7ms TimeCoverageRelationStatistics Valid=284, Invalid=1122, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:37:12,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-07-09 17:37:12,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 284. [2021-07-09 17:37:12,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.954063604240283) internal successors, (836), 283 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 836 transitions. [2021-07-09 17:37:12,184 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 836 transitions. Word has length 20 [2021-07-09 17:37:12,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:12,184 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 836 transitions. [2021-07-09 17:37:12,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 836 transitions. [2021-07-09 17:37:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:12,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:12,185 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:12,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:12,402 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:12,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:12,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2054143060, now seen corresponding path program 3 times [2021-07-09 17:37:12,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:12,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557648730] [2021-07-09 17:37:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:12,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:12,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557648730] [2021-07-09 17:37:12,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557648730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:12,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916330168] [2021-07-09 17:37:12,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:12,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:37:12,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:12,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:12,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:12,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916330168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:12,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:12,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-07-09 17:37:12,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837824199] [2021-07-09 17:37:12,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:12,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:12,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:12,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:12,856 INFO L87 Difference]: Start difference. First operand 284 states and 836 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:13,296 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-07-09 17:37:14,061 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-07-09 17:37:14,843 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-07-09 17:37:15,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:15,093 INFO L93 Difference]: Finished difference Result 766 states and 2175 transitions. [2021-07-09 17:37:15,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:37:15,094 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:15,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:15,097 INFO L225 Difference]: With dead ends: 766 [2021-07-09 17:37:15,097 INFO L226 Difference]: Without dead ends: 654 [2021-07-09 17:37:15,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1971.6ms TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:37:15,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-07-09 17:37:15,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 303. [2021-07-09 17:37:15,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9205298013245033) internal successors, (882), 302 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 882 transitions. [2021-07-09 17:37:15,107 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 882 transitions. Word has length 20 [2021-07-09 17:37:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:15,108 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 882 transitions. [2021-07-09 17:37:15,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:15,108 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 882 transitions. [2021-07-09 17:37:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:15,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:15,108 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:15,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:15,323 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:15,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:15,323 INFO L82 PathProgramCache]: Analyzing trace with hash 585717068, now seen corresponding path program 4 times [2021-07-09 17:37:15,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:15,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536039626] [2021-07-09 17:37:15,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:15,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:15,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536039626] [2021-07-09 17:37:15,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536039626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:15,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239139587] [2021-07-09 17:37:15,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:15,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:15,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:15,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:15,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:16,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239139587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:16,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:16,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-07-09 17:37:16,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909316680] [2021-07-09 17:37:16,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:37:16,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:16,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:37:16,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:16,064 INFO L87 Difference]: Start difference. First operand 303 states and 882 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:17,321 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-07-09 17:37:17,550 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-07-09 17:37:17,710 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-07-09 17:37:18,035 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-07-09 17:37:18,431 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-07-09 17:37:18,820 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-07-09 17:37:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:19,016 INFO L93 Difference]: Finished difference Result 971 states and 2714 transitions. [2021-07-09 17:37:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:37:19,017 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:19,020 INFO L225 Difference]: With dead ends: 971 [2021-07-09 17:37:19,020 INFO L226 Difference]: Without dead ends: 736 [2021-07-09 17:37:19,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2913.1ms TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:37:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-07-09 17:37:19,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 362. [2021-07-09 17:37:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.0554016620498614) internal successors, (1103), 361 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:19,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1103 transitions. [2021-07-09 17:37:19,028 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1103 transitions. Word has length 20 [2021-07-09 17:37:19,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:19,028 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1103 transitions. [2021-07-09 17:37:19,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:19,028 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1103 transitions. [2021-07-09 17:37:19,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:19,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:19,029 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:19,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 17:37:19,246 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:19,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:19,246 INFO L82 PathProgramCache]: Analyzing trace with hash -2103334614, now seen corresponding path program 5 times [2021-07-09 17:37:19,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:19,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86667067] [2021-07-09 17:37:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:19,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:19,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86667067] [2021-07-09 17:37:19,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86667067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:19,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888346484] [2021-07-09 17:37:19,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:19,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:19,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:19,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:19,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:19,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888346484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:19,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:19,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 17:37:19,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341760997] [2021-07-09 17:37:19,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:37:19,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:19,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:37:19,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:19,709 INFO L87 Difference]: Start difference. First operand 362 states and 1103 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:20,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:20,976 INFO L93 Difference]: Finished difference Result 667 states and 1967 transitions. [2021-07-09 17:37:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:37:20,976 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:20,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:20,978 INFO L225 Difference]: With dead ends: 667 [2021-07-09 17:37:20,978 INFO L226 Difference]: Without dead ends: 592 [2021-07-09 17:37:20,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1100.9ms TimeCoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:37:20,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-07-09 17:37:20,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 368. [2021-07-09 17:37:20,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0544959128065394) internal successors, (1121), 367 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:20,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1121 transitions. [2021-07-09 17:37:20,985 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1121 transitions. Word has length 20 [2021-07-09 17:37:20,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:20,985 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1121 transitions. [2021-07-09 17:37:20,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:20,986 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1121 transitions. [2021-07-09 17:37:20,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:20,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:20,986 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:21,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:21,203 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:21,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:21,203 INFO L82 PathProgramCache]: Analyzing trace with hash -927843970, now seen corresponding path program 6 times [2021-07-09 17:37:21,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:21,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752838729] [2021-07-09 17:37:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:21,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:21,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752838729] [2021-07-09 17:37:21,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752838729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:21,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559383677] [2021-07-09 17:37:21,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:21,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:37:21,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:21,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:21,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:21,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559383677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:21,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:21,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:37:21,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603839361] [2021-07-09 17:37:21,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:21,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:21,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:21,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:21,533 INFO L87 Difference]: Start difference. First operand 368 states and 1121 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:21,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:21,770 INFO L93 Difference]: Finished difference Result 643 states and 1884 transitions. [2021-07-09 17:37:21,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:37:21,770 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:21,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:21,772 INFO L225 Difference]: With dead ends: 643 [2021-07-09 17:37:21,772 INFO L226 Difference]: Without dead ends: 565 [2021-07-09 17:37:21,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:21,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-07-09 17:37:21,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 374. [2021-07-09 17:37:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.06970509383378) internal successors, (1145), 373 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:21,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1145 transitions. [2021-07-09 17:37:21,779 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1145 transitions. Word has length 20 [2021-07-09 17:37:21,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:21,779 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1145 transitions. [2021-07-09 17:37:21,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:21,779 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1145 transitions. [2021-07-09 17:37:21,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:21,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:21,780 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:21,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:21,997 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:21,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:21,997 INFO L82 PathProgramCache]: Analyzing trace with hash 685722764, now seen corresponding path program 7 times [2021-07-09 17:37:21,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:21,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681143066] [2021-07-09 17:37:21,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:22,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:22,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681143066] [2021-07-09 17:37:22,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681143066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:22,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620027151] [2021-07-09 17:37:22,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:22,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:22,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:22,612 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1, ends_with_6], 1=[ends_with_2]} [2021-07-09 17:37:22,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:22,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:22,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:22,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:22,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:22,635 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,637 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:37:22,638 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,698 INFO L628 ElimStorePlain]: treesize reduction 83, result has 46.1 percent of original size [2021-07-09 17:37:22,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:37:22,702 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,739 INFO L628 ElimStorePlain]: treesize reduction 25, result has 63.2 percent of original size [2021-07-09 17:37:22,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:22,743 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:37:22,746 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:22,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:22,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:22,762 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:278, output treesize:20 [2021-07-09 17:37:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:22,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620027151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:22,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:22,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-07-09 17:37:22,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189869677] [2021-07-09 17:37:22,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:22,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:22,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:22,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:22,813 INFO L87 Difference]: Start difference. First operand 374 states and 1145 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:23,703 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-07-09 17:37:23,963 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-07-09 17:37:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:24,153 INFO L93 Difference]: Finished difference Result 613 states and 1787 transitions. [2021-07-09 17:37:24,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:37:24,154 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:24,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:24,156 INFO L225 Difference]: With dead ends: 613 [2021-07-09 17:37:24,156 INFO L226 Difference]: Without dead ends: 553 [2021-07-09 17:37:24,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1181.8ms TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:37:24,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-07-09 17:37:24,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 384. [2021-07-09 17:37:24,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0548302872062663) internal successors, (1170), 383 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:24,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1170 transitions. [2021-07-09 17:37:24,163 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1170 transitions. Word has length 20 [2021-07-09 17:37:24,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:24,163 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1170 transitions. [2021-07-09 17:37:24,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:24,163 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1170 transitions. [2021-07-09 17:37:24,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:24,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:24,164 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:24,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 17:37:24,369 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:24,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:24,369 INFO L82 PathProgramCache]: Analyzing trace with hash 504067178, now seen corresponding path program 8 times [2021-07-09 17:37:24,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:24,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067521355] [2021-07-09 17:37:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:24,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:24,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067521355] [2021-07-09 17:37:24,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067521355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:24,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408535311] [2021-07-09 17:37:24,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:24,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:24,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:24,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:24,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:24,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408535311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:24,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:24,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:37:24,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970880511] [2021-07-09 17:37:24,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:24,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:24,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:24,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:24,660 INFO L87 Difference]: Start difference. First operand 384 states and 1170 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:24,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:24,938 INFO L93 Difference]: Finished difference Result 663 states and 1941 transitions. [2021-07-09 17:37:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:37:24,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:24,940 INFO L225 Difference]: With dead ends: 663 [2021-07-09 17:37:24,940 INFO L226 Difference]: Without dead ends: 537 [2021-07-09 17:37:24,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 327.7ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-07-09 17:37:24,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 389. [2021-07-09 17:37:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.054123711340206) internal successors, (1185), 388 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:24,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1185 transitions. [2021-07-09 17:37:24,947 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1185 transitions. Word has length 20 [2021-07-09 17:37:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:24,947 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1185 transitions. [2021-07-09 17:37:24,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1185 transitions. [2021-07-09 17:37:24,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:24,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:24,948 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:25,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:25,165 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:25,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:25,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1287248534, now seen corresponding path program 9 times [2021-07-09 17:37:25,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:25,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981379524] [2021-07-09 17:37:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:25,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:25,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981379524] [2021-07-09 17:37:25,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981379524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:25,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369947621] [2021-07-09 17:37:25,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:25,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:37:25,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:25,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:25,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:25,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369947621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:25,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:25,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:37:25,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803688470] [2021-07-09 17:37:25,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:25,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:25,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:25,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:25,502 INFO L87 Difference]: Start difference. First operand 389 states and 1185 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:26,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:26,026 INFO L93 Difference]: Finished difference Result 865 states and 2507 transitions. [2021-07-09 17:37:26,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:26,026 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:26,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:26,029 INFO L225 Difference]: With dead ends: 865 [2021-07-09 17:37:26,029 INFO L226 Difference]: Without dead ends: 722 [2021-07-09 17:37:26,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 588.5ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:37:26,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-07-09 17:37:26,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 395. [2021-07-09 17:37:26,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.068527918781726) internal successors, (1209), 394 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:26,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1209 transitions. [2021-07-09 17:37:26,038 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1209 transitions. Word has length 20 [2021-07-09 17:37:26,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:26,038 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1209 transitions. [2021-07-09 17:37:26,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:26,039 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1209 transitions. [2021-07-09 17:37:26,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:26,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:26,039 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:26,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-09 17:37:26,256 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:26,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:26,256 INFO L82 PathProgramCache]: Analyzing trace with hash 326318200, now seen corresponding path program 10 times [2021-07-09 17:37:26,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:26,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579425404] [2021-07-09 17:37:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:26,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:26,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579425404] [2021-07-09 17:37:26,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579425404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:26,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087264570] [2021-07-09 17:37:26,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:26,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:26,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:26,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:26,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:26,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087264570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:26,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:26,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:37:26,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506206292] [2021-07-09 17:37:26,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:26,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:26,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:26,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:26,571 INFO L87 Difference]: Start difference. First operand 395 states and 1209 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:26,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:26,882 INFO L93 Difference]: Finished difference Result 717 states and 2094 transitions. [2021-07-09 17:37:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:26,882 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:26,884 INFO L225 Difference]: With dead ends: 717 [2021-07-09 17:37:26,884 INFO L226 Difference]: Without dead ends: 558 [2021-07-09 17:37:26,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 389.4ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-07-09 17:37:26,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 389. [2021-07-09 17:37:26,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.054123711340206) internal successors, (1185), 388 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1185 transitions. [2021-07-09 17:37:26,891 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1185 transitions. Word has length 20 [2021-07-09 17:37:26,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:26,891 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1185 transitions. [2021-07-09 17:37:26,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:26,891 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1185 transitions. [2021-07-09 17:37:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:26,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:26,892 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:27,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-09 17:37:27,108 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:27,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:27,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1731378416, now seen corresponding path program 11 times [2021-07-09 17:37:27,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:27,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196372999] [2021-07-09 17:37:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:27,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:27,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196372999] [2021-07-09 17:37:27,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196372999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:27,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518422666] [2021-07-09 17:37:27,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:27,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:27,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:27,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:27,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:27,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518422666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:27,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:27,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:37:27,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357440172] [2021-07-09 17:37:27,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:27,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:27,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:27,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:27,436 INFO L87 Difference]: Start difference. First operand 389 states and 1185 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:29,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:29,169 INFO L93 Difference]: Finished difference Result 980 states and 2855 transitions. [2021-07-09 17:37:29,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:37:29,169 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:29,172 INFO L225 Difference]: With dead ends: 980 [2021-07-09 17:37:29,172 INFO L226 Difference]: Without dead ends: 780 [2021-07-09 17:37:29,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1516.8ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:37:29,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-07-09 17:37:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 442. [2021-07-09 17:37:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0657596371882088) internal successors, (1352), 441 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:29,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1352 transitions. [2021-07-09 17:37:29,180 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1352 transitions. Word has length 20 [2021-07-09 17:37:29,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:29,180 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1352 transitions. [2021-07-09 17:37:29,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1352 transitions. [2021-07-09 17:37:29,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:29,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:29,181 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:29,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-07-09 17:37:29,397 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:29,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:29,397 INFO L82 PathProgramCache]: Analyzing trace with hash -852916892, now seen corresponding path program 12 times [2021-07-09 17:37:29,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:29,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377919521] [2021-07-09 17:37:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:29,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:29,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377919521] [2021-07-09 17:37:29,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377919521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:29,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232253418] [2021-07-09 17:37:29,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:29,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:37:29,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:29,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:37:29,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:29,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:37:29,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:29,647 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.5 percent of original size [2021-07-09 17:37:29,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:37:29,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:29,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:29,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:29,704 INFO L628 ElimStorePlain]: treesize reduction 18, result has 76.6 percent of original size [2021-07-09 17:37:29,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:29,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:29,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:29,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:29,732 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:91, output treesize:55 [2021-07-09 17:37:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:29,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232253418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:29,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:29,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:37:29,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841844677] [2021-07-09 17:37:29,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:29,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:29,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:29,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:29,994 INFO L87 Difference]: Start difference. First operand 442 states and 1352 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:30,371 INFO L93 Difference]: Finished difference Result 830 states and 2406 transitions. [2021-07-09 17:37:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:30,371 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:30,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:30,374 INFO L225 Difference]: With dead ends: 830 [2021-07-09 17:37:30,374 INFO L226 Difference]: Without dead ends: 687 [2021-07-09 17:37:30,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-07-09 17:37:30,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 452. [2021-07-09 17:37:30,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.0776053215077606) internal successors, (1388), 451 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1388 transitions. [2021-07-09 17:37:30,383 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1388 transitions. Word has length 20 [2021-07-09 17:37:30,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:30,383 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1388 transitions. [2021-07-09 17:37:30,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:30,383 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1388 transitions. [2021-07-09 17:37:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:37:30,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:30,384 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:30,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-09 17:37:30,586 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:30,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:30,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1463437194, now seen corresponding path program 13 times [2021-07-09 17:37:30,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:30,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938272872] [2021-07-09 17:37:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:30,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:30,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938272872] [2021-07-09 17:37:30,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938272872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:30,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167465123] [2021-07-09 17:37:30,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:30,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:37:30,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:30,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167465123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:30,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:30,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:37:30,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986137838] [2021-07-09 17:37:30,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:30,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:30,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:30,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:30,893 INFO L87 Difference]: Start difference. First operand 452 states and 1388 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:31,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:31,016 INFO L93 Difference]: Finished difference Result 595 states and 1752 transitions. [2021-07-09 17:37:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:37:31,016 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:37:31,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:31,018 INFO L225 Difference]: With dead ends: 595 [2021-07-09 17:37:31,018 INFO L226 Difference]: Without dead ends: 475 [2021-07-09 17:37:31,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:31,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-09 17:37:31,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 442. [2021-07-09 17:37:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0657596371882088) internal successors, (1352), 441 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1352 transitions. [2021-07-09 17:37:31,024 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1352 transitions. Word has length 20 [2021-07-09 17:37:31,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:31,024 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1352 transitions. [2021-07-09 17:37:31,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:31,024 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1352 transitions. [2021-07-09 17:37:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:31,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:31,025 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:31,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:31,242 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:31,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1353227094, now seen corresponding path program 14 times [2021-07-09 17:37:31,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:31,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273649751] [2021-07-09 17:37:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:31,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:31,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273649751] [2021-07-09 17:37:31,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273649751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:31,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846988137] [2021-07-09 17:37:31,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:31,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:31,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:31,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:37:31,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:31,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:31,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:31,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:31,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:31,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:31,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:31,406 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:37:31,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:31,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:31,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:37:31,412 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:31,436 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:37:31,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:31,437 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:37:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:31,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846988137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:31,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:31,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 17:37:31,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893734639] [2021-07-09 17:37:31,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:37:31,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:31,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:37:31,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:37:31,475 INFO L87 Difference]: Start difference. First operand 442 states and 1352 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:31,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:31,651 INFO L93 Difference]: Finished difference Result 699 states and 2099 transitions. [2021-07-09 17:37:31,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:31,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:31,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:31,654 INFO L225 Difference]: With dead ends: 699 [2021-07-09 17:37:31,654 INFO L226 Difference]: Without dead ends: 648 [2021-07-09 17:37:31,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:31,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-07-09 17:37:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 421. [2021-07-09 17:37:31,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.0904761904761906) internal successors, (1298), 420 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1298 transitions. [2021-07-09 17:37:31,661 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1298 transitions. Word has length 21 [2021-07-09 17:37:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:31,661 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1298 transitions. [2021-07-09 17:37:31,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:31,661 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1298 transitions. [2021-07-09 17:37:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:31,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:31,662 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:31,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-07-09 17:37:31,865 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:31,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:31,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2142789994, now seen corresponding path program 15 times [2021-07-09 17:37:31,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:31,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295661891] [2021-07-09 17:37:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:31,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:31,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295661891] [2021-07-09 17:37:31,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295661891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:31,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924179573] [2021-07-09 17:37:31,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:31,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:31,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:31,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:37:31,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:32,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:32,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:32,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:32,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,074 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:37:32,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:32,076 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:37:32,079 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:32,103 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:37:32,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:32,104 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:37:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:32,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924179573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:32,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:32,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 17:37:32,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054599160] [2021-07-09 17:37:32,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:37:32,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:32,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:37:32,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:37:32,138 INFO L87 Difference]: Start difference. First operand 421 states and 1298 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:32,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:32,385 INFO L93 Difference]: Finished difference Result 665 states and 2020 transitions. [2021-07-09 17:37:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:32,386 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:32,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:32,388 INFO L225 Difference]: With dead ends: 665 [2021-07-09 17:37:32,388 INFO L226 Difference]: Without dead ends: 614 [2021-07-09 17:37:32,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:32,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-07-09 17:37:32,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 432. [2021-07-09 17:37:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1113689095127612) internal successors, (1341), 431 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1341 transitions. [2021-07-09 17:37:32,395 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1341 transitions. Word has length 21 [2021-07-09 17:37:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:32,395 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1341 transitions. [2021-07-09 17:37:32,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:32,395 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1341 transitions. [2021-07-09 17:37:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:32,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:32,396 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:32,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:32,602 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:32,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:32,603 INFO L82 PathProgramCache]: Analyzing trace with hash -967299350, now seen corresponding path program 16 times [2021-07-09 17:37:32,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:32,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148426565] [2021-07-09 17:37:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:32,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:32,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148426565] [2021-07-09 17:37:32,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148426565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:32,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131869709] [2021-07-09 17:37:32,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:32,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:32,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:32,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:37:32,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:32,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131869709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:32,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:32,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 17:37:32,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056951596] [2021-07-09 17:37:32,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:37:32,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:32,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:37:32,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:37:32,864 INFO L87 Difference]: Start difference. First operand 432 states and 1341 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:33,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:33,084 INFO L93 Difference]: Finished difference Result 728 states and 2188 transitions. [2021-07-09 17:37:33,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:33,085 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:33,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:33,087 INFO L225 Difference]: With dead ends: 728 [2021-07-09 17:37:33,087 INFO L226 Difference]: Without dead ends: 677 [2021-07-09 17:37:33,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:37:33,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-07-09 17:37:33,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 443. [2021-07-09 17:37:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.1561085972850678) internal successors, (1395), 442 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1395 transitions. [2021-07-09 17:37:33,094 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1395 transitions. Word has length 21 [2021-07-09 17:37:33,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:33,094 INFO L482 AbstractCegarLoop]: Abstraction has 443 states and 1395 transitions. [2021-07-09 17:37:33,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1395 transitions. [2021-07-09 17:37:33,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:33,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:33,096 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:33,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-07-09 17:37:33,312 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:33,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:33,312 INFO L82 PathProgramCache]: Analyzing trace with hash 646267384, now seen corresponding path program 17 times [2021-07-09 17:37:33,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:33,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844778858] [2021-07-09 17:37:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:33,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:33,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:33,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844778858] [2021-07-09 17:37:33,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844778858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:33,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772274349] [2021-07-09 17:37:33,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:33,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:33,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:33,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:37:33,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:33,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772274349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:33,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:33,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:37:33,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338983989] [2021-07-09 17:37:33,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:33,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:33,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:33,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:33,558 INFO L87 Difference]: Start difference. First operand 443 states and 1395 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:33,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:33,853 INFO L93 Difference]: Finished difference Result 654 states and 1967 transitions. [2021-07-09 17:37:33,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:33,853 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:33,859 INFO L225 Difference]: With dead ends: 654 [2021-07-09 17:37:33,859 INFO L226 Difference]: Without dead ends: 591 [2021-07-09 17:37:33,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:33,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-07-09 17:37:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 413. [2021-07-09 17:37:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.0728155339805827) internal successors, (1266), 412 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:33,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1266 transitions. [2021-07-09 17:37:33,865 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1266 transitions. Word has length 21 [2021-07-09 17:37:33,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:33,865 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1266 transitions. [2021-07-09 17:37:33,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:33,865 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1266 transitions. [2021-07-09 17:37:33,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:33,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:33,866 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:34,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-07-09 17:37:34,082 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:34,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:34,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1289968066, now seen corresponding path program 18 times [2021-07-09 17:37:34,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:34,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159286444] [2021-07-09 17:37:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:34,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:34,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159286444] [2021-07-09 17:37:34,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159286444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:34,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563442705] [2021-07-09 17:37:34,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:34,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:34,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:34,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:34,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:34,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563442705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:34,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:34,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-09 17:37:34,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555808665] [2021-07-09 17:37:34,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:34,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:34,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:34,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:34,385 INFO L87 Difference]: Start difference. First operand 413 states and 1266 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:34,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:34,745 INFO L93 Difference]: Finished difference Result 864 states and 2562 transitions. [2021-07-09 17:37:34,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:34,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:34,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:34,748 INFO L225 Difference]: With dead ends: 864 [2021-07-09 17:37:34,748 INFO L226 Difference]: Without dead ends: 812 [2021-07-09 17:37:34,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 362.7ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:34,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-07-09 17:37:34,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 458. [2021-07-09 17:37:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1684901531728666) internal successors, (1448), 457 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1448 transitions. [2021-07-09 17:37:34,756 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1448 transitions. Word has length 21 [2021-07-09 17:37:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:34,756 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1448 transitions. [2021-07-09 17:37:34,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:34,756 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1448 transitions. [2021-07-09 17:37:34,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:34,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:34,757 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:34,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:34,973 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:34,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:34,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1898744654, now seen corresponding path program 19 times [2021-07-09 17:37:34,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:34,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356237779] [2021-07-09 17:37:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:35,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:35,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356237779] [2021-07-09 17:37:35,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356237779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:35,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248900350] [2021-07-09 17:37:35,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:35,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:35,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:35,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248900350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:35,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:35,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-09 17:37:35,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703163022] [2021-07-09 17:37:35,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:35,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:35,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:35,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:35,260 INFO L87 Difference]: Start difference. First operand 458 states and 1448 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:35,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:35,846 INFO L93 Difference]: Finished difference Result 906 states and 2628 transitions. [2021-07-09 17:37:35,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:37:35,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:35,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:35,848 INFO L225 Difference]: With dead ends: 906 [2021-07-09 17:37:35,848 INFO L226 Difference]: Without dead ends: 837 [2021-07-09 17:37:35,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 521.4ms TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:37:35,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-07-09 17:37:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 464. [2021-07-09 17:37:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.1295896328293735) internal successors, (1449), 463 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1449 transitions. [2021-07-09 17:37:35,856 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1449 transitions. Word has length 21 [2021-07-09 17:37:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:35,857 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1449 transitions. [2021-07-09 17:37:35,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1449 transitions. [2021-07-09 17:37:35,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:35,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:35,858 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:36,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-07-09 17:37:36,074 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:36,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:36,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1066038364, now seen corresponding path program 20 times [2021-07-09 17:37:36,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:36,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792510402] [2021-07-09 17:37:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:36,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:36,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792510402] [2021-07-09 17:37:36,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792510402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:36,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401053256] [2021-07-09 17:37:36,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:36,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:36,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:36,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:36,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:36,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401053256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:36,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:36,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-07-09 17:37:36,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310195139] [2021-07-09 17:37:36,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:37:36,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:36,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:37:36,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:36,322 INFO L87 Difference]: Start difference. First operand 464 states and 1449 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:36,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:36,739 INFO L93 Difference]: Finished difference Result 795 states and 2331 transitions. [2021-07-09 17:37:36,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:36,740 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:36,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:36,741 INFO L225 Difference]: With dead ends: 795 [2021-07-09 17:37:36,741 INFO L226 Difference]: Without dead ends: 713 [2021-07-09 17:37:36,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 362.8ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:36,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-07-09 17:37:36,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 471. [2021-07-09 17:37:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.0914893617021275) internal successors, (1453), 470 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:36,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1453 transitions. [2021-07-09 17:37:36,749 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1453 transitions. Word has length 21 [2021-07-09 17:37:36,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:36,749 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1453 transitions. [2021-07-09 17:37:36,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:36,749 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1453 transitions. [2021-07-09 17:37:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:36,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:36,750 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:36,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-07-09 17:37:36,966 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:36,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:36,966 INFO L82 PathProgramCache]: Analyzing trace with hash 601158056, now seen corresponding path program 21 times [2021-07-09 17:37:36,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:36,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472740943] [2021-07-09 17:37:36,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:37,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:37,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472740943] [2021-07-09 17:37:37,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472740943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:37,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351960491] [2021-07-09 17:37:37,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:37,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:37:37,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:37,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:37,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:37,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351960491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:37,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:37,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-09 17:37:37,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184200825] [2021-07-09 17:37:37,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:37,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:37,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:37,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:37,202 INFO L87 Difference]: Start difference. First operand 471 states and 1453 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:37,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:37,597 INFO L93 Difference]: Finished difference Result 773 states and 2266 transitions. [2021-07-09 17:37:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:37,597 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:37,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:37,598 INFO L225 Difference]: With dead ends: 773 [2021-07-09 17:37:37,598 INFO L226 Difference]: Without dead ends: 672 [2021-07-09 17:37:37,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:37,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-09 17:37:37,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 462. [2021-07-09 17:37:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.0390455531453364) internal successors, (1401), 461 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1401 transitions. [2021-07-09 17:37:37,606 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1401 transitions. Word has length 21 [2021-07-09 17:37:37,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:37,606 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1401 transitions. [2021-07-09 17:37:37,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:37,606 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1401 transitions. [2021-07-09 17:37:37,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:37,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:37,607 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:37,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:37,823 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:37,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:37,823 INFO L82 PathProgramCache]: Analyzing trace with hash 454395940, now seen corresponding path program 22 times [2021-07-09 17:37:37,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:37,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986462544] [2021-07-09 17:37:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:37,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:37,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986462544] [2021-07-09 17:37:37,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986462544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:37,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200526727] [2021-07-09 17:37:37,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:37,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:37,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:37,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:37,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:38,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200526727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:38,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:38,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-09 17:37:38,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76733287] [2021-07-09 17:37:38,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:38,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:38,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:38,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:38,070 INFO L87 Difference]: Start difference. First operand 462 states and 1401 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:38,252 INFO L93 Difference]: Finished difference Result 807 states and 2396 transitions. [2021-07-09 17:37:38,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:38,252 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:38,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:38,253 INFO L225 Difference]: With dead ends: 807 [2021-07-09 17:37:38,253 INFO L226 Difference]: Without dead ends: 755 [2021-07-09 17:37:38,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:37:38,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-07-09 17:37:38,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 506. [2021-07-09 17:37:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.130693069306931) internal successors, (1581), 505 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1581 transitions. [2021-07-09 17:37:38,262 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1581 transitions. Word has length 21 [2021-07-09 17:37:38,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:38,262 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1581 transitions. [2021-07-09 17:37:38,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:38,262 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1581 transitions. [2021-07-09 17:37:38,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:38,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:38,263 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:38,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-07-09 17:37:38,479 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:38,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:38,479 INFO L82 PathProgramCache]: Analyzing trace with hash -651858636, now seen corresponding path program 23 times [2021-07-09 17:37:38,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:38,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564527504] [2021-07-09 17:37:38,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:38,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:38,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564527504] [2021-07-09 17:37:38,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564527504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:38,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120766682] [2021-07-09 17:37:38,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:38,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:38,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:38,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:38,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:38,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120766682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:38,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:38,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-09 17:37:38,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793834553] [2021-07-09 17:37:38,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:38,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:38,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:38,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:38,735 INFO L87 Difference]: Start difference. First operand 506 states and 1581 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:39,114 INFO L93 Difference]: Finished difference Result 851 states and 2469 transitions. [2021-07-09 17:37:39,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:37:39,114 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:39,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:39,116 INFO L225 Difference]: With dead ends: 851 [2021-07-09 17:37:39,116 INFO L226 Difference]: Without dead ends: 782 [2021-07-09 17:37:39,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 338.5ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:37:39,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-07-09 17:37:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 491. [2021-07-09 17:37:39,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.0816326530612246) internal successors, (1510), 490 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1510 transitions. [2021-07-09 17:37:39,124 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1510 transitions. Word has length 21 [2021-07-09 17:37:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:39,124 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1510 transitions. [2021-07-09 17:37:39,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:39,124 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1510 transitions. [2021-07-09 17:37:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:39,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:39,125 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:39,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-07-09 17:37:39,341 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:39,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1484564926, now seen corresponding path program 24 times [2021-07-09 17:37:39,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:39,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164787182] [2021-07-09 17:37:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:39,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:39,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164787182] [2021-07-09 17:37:39,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164787182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:39,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205764116] [2021-07-09 17:37:39,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:39,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:37:39,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:39,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:39,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:39,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205764116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:39,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:39,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-07-09 17:37:39,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527885283] [2021-07-09 17:37:39,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:39,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:39,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:39,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:39,695 INFO L87 Difference]: Start difference. First operand 491 states and 1510 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:39,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:39,996 INFO L93 Difference]: Finished difference Result 682 states and 1999 transitions. [2021-07-09 17:37:39,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:39,996 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:39,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:39,998 INFO L225 Difference]: With dead ends: 682 [2021-07-09 17:37:39,998 INFO L226 Difference]: Without dead ends: 600 [2021-07-09 17:37:39,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-07-09 17:37:40,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 476. [2021-07-09 17:37:40,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.0442105263157893) internal successors, (1446), 475 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:40,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1446 transitions. [2021-07-09 17:37:40,005 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1446 transitions. Word has length 21 [2021-07-09 17:37:40,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:40,005 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1446 transitions. [2021-07-09 17:37:40,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1446 transitions. [2021-07-09 17:37:40,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:40,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:40,006 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:40,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-07-09 17:37:40,222 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:40,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:40,222 INFO L82 PathProgramCache]: Analyzing trace with hash -818537768, now seen corresponding path program 25 times [2021-07-09 17:37:40,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:40,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830272794] [2021-07-09 17:37:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:40,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:40,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830272794] [2021-07-09 17:37:40,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830272794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:40,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500928367] [2021-07-09 17:37:40,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:40,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:40,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:40,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500928367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:40,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:40,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-09 17:37:40,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130255539] [2021-07-09 17:37:40,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:40,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:40,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:40,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:40,426 INFO L87 Difference]: Start difference. First operand 476 states and 1446 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:40,609 INFO L93 Difference]: Finished difference Result 853 states and 2541 transitions. [2021-07-09 17:37:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:40,610 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:40,611 INFO L225 Difference]: With dead ends: 853 [2021-07-09 17:37:40,611 INFO L226 Difference]: Without dead ends: 801 [2021-07-09 17:37:40,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:37:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-07-09 17:37:40,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 514. [2021-07-09 17:37:40,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.142300194931774) internal successors, (1612), 513 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:40,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1612 transitions. [2021-07-09 17:37:40,620 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1612 transitions. Word has length 21 [2021-07-09 17:37:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:40,620 INFO L482 AbstractCegarLoop]: Abstraction has 514 states and 1612 transitions. [2021-07-09 17:37:40,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1612 transitions. [2021-07-09 17:37:40,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:40,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:40,621 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:40,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:40,837 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:40,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:40,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1924792344, now seen corresponding path program 26 times [2021-07-09 17:37:40,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:40,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294941429] [2021-07-09 17:37:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:40,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:40,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294941429] [2021-07-09 17:37:40,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294941429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:40,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877679778] [2021-07-09 17:37:40,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:40,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:40,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:40,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:40,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:41,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877679778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:41,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:41,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-09 17:37:41,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546556296] [2021-07-09 17:37:41,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:41,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:41,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:41,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:41,046 INFO L87 Difference]: Start difference. First operand 514 states and 1612 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:41,290 INFO L93 Difference]: Finished difference Result 772 states and 2308 transitions. [2021-07-09 17:37:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:37:41,291 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:41,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:41,292 INFO L225 Difference]: With dead ends: 772 [2021-07-09 17:37:41,292 INFO L226 Difference]: Without dead ends: 703 [2021-07-09 17:37:41,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 226.6ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:37:41,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-07-09 17:37:41,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 501. [2021-07-09 17:37:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 3.092) internal successors, (1546), 500 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:41,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1546 transitions. [2021-07-09 17:37:41,300 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1546 transitions. Word has length 21 [2021-07-09 17:37:41,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:41,300 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1546 transitions. [2021-07-09 17:37:41,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1546 transitions. [2021-07-09 17:37:41,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:41,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:41,301 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:41,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-07-09 17:37:41,517 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:41,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:41,517 INFO L82 PathProgramCache]: Analyzing trace with hash 941515172, now seen corresponding path program 27 times [2021-07-09 17:37:41,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:41,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421076886] [2021-07-09 17:37:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:41,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:41,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421076886] [2021-07-09 17:37:41,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421076886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:41,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938148637] [2021-07-09 17:37:41,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:41,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:41,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:41,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:41,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:41,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938148637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:41,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:41,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-07-09 17:37:41,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918278946] [2021-07-09 17:37:41,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:41,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:41,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:41,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:41,694 INFO L87 Difference]: Start difference. First operand 501 states and 1546 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:41,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:41,868 INFO L93 Difference]: Finished difference Result 688 states and 2059 transitions. [2021-07-09 17:37:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:41,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:41,870 INFO L225 Difference]: With dead ends: 688 [2021-07-09 17:37:41,870 INFO L226 Difference]: Without dead ends: 636 [2021-07-09 17:37:41,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:37:41,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-07-09 17:37:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 481. [2021-07-09 17:37:41,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.0625) internal successors, (1470), 480 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1470 transitions. [2021-07-09 17:37:41,877 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1470 transitions. Word has length 21 [2021-07-09 17:37:41,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:41,878 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1470 transitions. [2021-07-09 17:37:41,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1470 transitions. [2021-07-09 17:37:41,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:41,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:41,879 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:42,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:42,095 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:42,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1149829974, now seen corresponding path program 28 times [2021-07-09 17:37:42,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:42,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073412794] [2021-07-09 17:37:42,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:42,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:42,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073412794] [2021-07-09 17:37:42,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073412794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:42,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672035676] [2021-07-09 17:37:42,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:42,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:42,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:42,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:37:42,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:42,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:42,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:42,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:42,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:37:42,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2021-07-09 17:37:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:42,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672035676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:42,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:42,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-07-09 17:37:42,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257902383] [2021-07-09 17:37:42,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:42,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:42,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:42,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:42,445 INFO L87 Difference]: Start difference. First operand 481 states and 1470 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:43,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:43,243 INFO L93 Difference]: Finished difference Result 800 states and 2393 transitions. [2021-07-09 17:37:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:37:43,243 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:43,245 INFO L225 Difference]: With dead ends: 800 [2021-07-09 17:37:43,245 INFO L226 Difference]: Without dead ends: 713 [2021-07-09 17:37:43,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 664.0ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:37:43,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-07-09 17:37:43,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 466. [2021-07-09 17:37:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0602150537634407) internal successors, (1423), 465 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1423 transitions. [2021-07-09 17:37:43,252 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1423 transitions. Word has length 21 [2021-07-09 17:37:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:43,252 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1423 transitions. [2021-07-09 17:37:43,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1423 transitions. [2021-07-09 17:37:43,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:43,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:43,253 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:43,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-07-09 17:37:43,469 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:43,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:43,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1969646678, now seen corresponding path program 29 times [2021-07-09 17:37:43,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:43,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746044098] [2021-07-09 17:37:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:43,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:43,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746044098] [2021-07-09 17:37:43,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746044098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:43,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920780577] [2021-07-09 17:37:43,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:43,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:43,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:43,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:37:43,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:43,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:43,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:43,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:43,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:37:43,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2021-07-09 17:37:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:43,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920780577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:43,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:43,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-07-09 17:37:43,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075949131] [2021-07-09 17:37:43,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:43,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:43,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:43,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:43,800 INFO L87 Difference]: Start difference. First operand 466 states and 1423 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:43,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:43,985 INFO L93 Difference]: Finished difference Result 732 states and 2198 transitions. [2021-07-09 17:37:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:37:43,985 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:43,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:43,987 INFO L225 Difference]: With dead ends: 732 [2021-07-09 17:37:43,987 INFO L226 Difference]: Without dead ends: 680 [2021-07-09 17:37:43,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:37:43,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-07-09 17:37:43,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 480. [2021-07-09 17:37:43,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.1022964509394573) internal successors, (1486), 479 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:43,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1486 transitions. [2021-07-09 17:37:43,994 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1486 transitions. Word has length 21 [2021-07-09 17:37:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:43,994 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1486 transitions. [2021-07-09 17:37:43,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:43,994 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1486 transitions. [2021-07-09 17:37:43,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:43,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:43,996 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:44,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:44,212 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:44,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:44,212 INFO L82 PathProgramCache]: Analyzing trace with hash -356079944, now seen corresponding path program 30 times [2021-07-09 17:37:44,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:44,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616515243] [2021-07-09 17:37:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:44,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:44,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616515243] [2021-07-09 17:37:44,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616515243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:44,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383240321] [2021-07-09 17:37:44,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:44,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:44,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:44,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:37:44,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:44,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:44,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:44,364 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.0 percent of original size [2021-07-09 17:37:44,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:37:44,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:18 [2021-07-09 17:37:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:44,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383240321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:44,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:44,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:37:44,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646470529] [2021-07-09 17:37:44,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:44,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:44,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:44,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:44,488 INFO L87 Difference]: Start difference. First operand 480 states and 1486 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:44,610 INFO L93 Difference]: Finished difference Result 663 states and 1991 transitions. [2021-07-09 17:37:44,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:37:44,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:44,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:44,612 INFO L225 Difference]: With dead ends: 663 [2021-07-09 17:37:44,612 INFO L226 Difference]: Without dead ends: 606 [2021-07-09 17:37:44,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-07-09 17:37:44,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 446. [2021-07-09 17:37:44,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.0584269662921346) internal successors, (1361), 445 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1361 transitions. [2021-07-09 17:37:44,618 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1361 transitions. Word has length 21 [2021-07-09 17:37:44,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:44,618 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1361 transitions. [2021-07-09 17:37:44,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:44,618 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1361 transitions. [2021-07-09 17:37:44,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:44,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:44,619 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:44,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-07-09 17:37:44,835 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:44,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:44,836 INFO L82 PathProgramCache]: Analyzing trace with hash 110824918, now seen corresponding path program 31 times [2021-07-09 17:37:44,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:44,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939184500] [2021-07-09 17:37:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:44,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:44,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939184500] [2021-07-09 17:37:44,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939184500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:44,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448348116] [2021-07-09 17:37:44,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:44,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:37:44,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:44,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:44,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:44,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:44,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:44,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:37:44,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:44,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:44,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:45,036 INFO L628 ElimStorePlain]: treesize reduction 40, result has 56.5 percent of original size [2021-07-09 17:37:45,036 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-07-09 17:37:45,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:45,037 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:107, output treesize:52 [2021-07-09 17:37:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:45,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448348116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:45,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:45,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:37:45,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929334816] [2021-07-09 17:37:45,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:45,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:45,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:45,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:45,158 INFO L87 Difference]: Start difference. First operand 446 states and 1361 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:45,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:45,366 INFO L93 Difference]: Finished difference Result 613 states and 1807 transitions. [2021-07-09 17:37:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:45,366 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:45,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:45,368 INFO L225 Difference]: With dead ends: 613 [2021-07-09 17:37:45,368 INFO L226 Difference]: Without dead ends: 561 [2021-07-09 17:37:45,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:37:45,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-07-09 17:37:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 431. [2021-07-09 17:37:45,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.041860465116279) internal successors, (1308), 430 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1308 transitions. [2021-07-09 17:37:45,374 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1308 transitions. Word has length 21 [2021-07-09 17:37:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:45,374 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1308 transitions. [2021-07-09 17:37:45,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1308 transitions. [2021-07-09 17:37:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:45,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:45,375 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:45,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-07-09 17:37:45,591 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:45,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:45,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1724391652, now seen corresponding path program 32 times [2021-07-09 17:37:45,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:45,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590930921] [2021-07-09 17:37:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:45,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:45,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590930921] [2021-07-09 17:37:45,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590930921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:45,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906772376] [2021-07-09 17:37:45,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:45,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:45,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:45,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:37:45,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:46,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906772376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:46,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:46,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-07-09 17:37:46,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425033215] [2021-07-09 17:37:46,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:46,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:46,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:46,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:46,015 INFO L87 Difference]: Start difference. First operand 431 states and 1308 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:47,024 INFO L93 Difference]: Finished difference Result 819 states and 2339 transitions. [2021-07-09 17:37:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:37:47,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:47,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:47,025 INFO L225 Difference]: With dead ends: 819 [2021-07-09 17:37:47,026 INFO L226 Difference]: Without dead ends: 715 [2021-07-09 17:37:47,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 941.1ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:37:47,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-07-09 17:37:47,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 427. [2021-07-09 17:37:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0) internal successors, (1278), 426 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1278 transitions. [2021-07-09 17:37:47,032 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1278 transitions. Word has length 21 [2021-07-09 17:37:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:47,033 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1278 transitions. [2021-07-09 17:37:47,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1278 transitions. [2021-07-09 17:37:47,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:47,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:47,033 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:47,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:47,248 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:47,248 INFO L82 PathProgramCache]: Analyzing trace with hash -214051430, now seen corresponding path program 33 times [2021-07-09 17:37:47,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:47,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257445317] [2021-07-09 17:37:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:47,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:47,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257445317] [2021-07-09 17:37:47,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257445317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:47,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547377262] [2021-07-09 17:37:47,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:47,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:37:47,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:47,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:37:47,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:47,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:37:47,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,446 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-07-09 17:37:47,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:47,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:37:47,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:37:47,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:37:47,483 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:37:47,519 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.4 percent of original size [2021-07-09 17:37:47,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:37:47,520 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:107, output treesize:49 [2021-07-09 17:37:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:47,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547377262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:47,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:47,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:37:47,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727154398] [2021-07-09 17:37:47,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:37:47,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:47,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:37:47,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:37:47,628 INFO L87 Difference]: Start difference. First operand 427 states and 1278 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:47,862 INFO L93 Difference]: Finished difference Result 542 states and 1584 transitions. [2021-07-09 17:37:47,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:37:47,862 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:47,863 INFO L225 Difference]: With dead ends: 542 [2021-07-09 17:37:47,863 INFO L226 Difference]: Without dead ends: 465 [2021-07-09 17:37:47,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:37:47,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-07-09 17:37:47,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 385. [2021-07-09 17:37:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0) internal successors, (1152), 384 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1152 transitions. [2021-07-09 17:37:47,868 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1152 transitions. Word has length 21 [2021-07-09 17:37:47,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:47,868 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1152 transitions. [2021-07-09 17:37:47,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:47,868 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1152 transitions. [2021-07-09 17:37:47,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:47,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:47,869 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:48,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-07-09 17:37:48,085 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:48,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:48,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1805824578, now seen corresponding path program 34 times [2021-07-09 17:37:48,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:48,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131152002] [2021-07-09 17:37:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:48,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:48,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131152002] [2021-07-09 17:37:48,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131152002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:48,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003209871] [2021-07-09 17:37:48,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:48,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:48,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:48,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:48,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:48,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003209871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:48,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:48,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:37:48,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883472656] [2021-07-09 17:37:48,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:48,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:48,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:48,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:48,427 INFO L87 Difference]: Start difference. First operand 385 states and 1152 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:49,574 INFO L93 Difference]: Finished difference Result 1027 states and 2935 transitions. [2021-07-09 17:37:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:37:49,574 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:49,576 INFO L225 Difference]: With dead ends: 1027 [2021-07-09 17:37:49,576 INFO L226 Difference]: Without dead ends: 876 [2021-07-09 17:37:49,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1016.1ms TimeCoverageRelationStatistics Valid=291, Invalid=1191, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:37:49,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-07-09 17:37:49,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 395. [2021-07-09 17:37:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.0076142131979697) internal successors, (1185), 394 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1185 transitions. [2021-07-09 17:37:49,583 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1185 transitions. Word has length 21 [2021-07-09 17:37:49,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:49,583 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1185 transitions. [2021-07-09 17:37:49,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:49,583 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1185 transitions. [2021-07-09 17:37:49,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:49,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:49,584 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:49,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:49,800 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:49,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:49,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1761625290, now seen corresponding path program 35 times [2021-07-09 17:37:49,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:49,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441509889] [2021-07-09 17:37:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:49,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:49,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441509889] [2021-07-09 17:37:49,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441509889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:49,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414232332] [2021-07-09 17:37:49,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:49,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:49,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:49,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:49,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:50,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414232332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:50,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:50,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-09 17:37:50,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480210630] [2021-07-09 17:37:50,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:50,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:50,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:50,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:50,067 INFO L87 Difference]: Start difference. First operand 395 states and 1185 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:50,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:50,462 INFO L93 Difference]: Finished difference Result 561 states and 1670 transitions. [2021-07-09 17:37:50,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:37:50,463 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:50,464 INFO L225 Difference]: With dead ends: 561 [2021-07-09 17:37:50,464 INFO L226 Difference]: Without dead ends: 509 [2021-07-09 17:37:50,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 311.2ms TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:37:50,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-09 17:37:50,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 404. [2021-07-09 17:37:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.0124069478908186) internal successors, (1214), 403 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1214 transitions. [2021-07-09 17:37:50,470 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1214 transitions. Word has length 21 [2021-07-09 17:37:50,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:50,470 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1214 transitions. [2021-07-09 17:37:50,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:50,470 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1214 transitions. [2021-07-09 17:37:50,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:50,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:50,471 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:50,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-07-09 17:37:50,687 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:50,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:50,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1539064924, now seen corresponding path program 36 times [2021-07-09 17:37:50,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:50,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012044223] [2021-07-09 17:37:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:50,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:50,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012044223] [2021-07-09 17:37:50,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012044223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:50,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552679500] [2021-07-09 17:37:50,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:50,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:37:50,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:50,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:50,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:50,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:50,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552679500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:50,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:50,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-07-09 17:37:50,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675569293] [2021-07-09 17:37:50,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:37:50,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:50,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:37:50,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:37:50,956 INFO L87 Difference]: Start difference. First operand 404 states and 1214 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:51,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:51,217 INFO L93 Difference]: Finished difference Result 648 states and 1890 transitions. [2021-07-09 17:37:51,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:37:51,217 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:51,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:51,218 INFO L225 Difference]: With dead ends: 648 [2021-07-09 17:37:51,218 INFO L226 Difference]: Without dead ends: 579 [2021-07-09 17:37:51,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:51,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-07-09 17:37:51,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 433. [2021-07-09 17:37:51,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.0300925925925926) internal successors, (1309), 432 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:51,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1309 transitions. [2021-07-09 17:37:51,224 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1309 transitions. Word has length 21 [2021-07-09 17:37:51,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:51,224 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1309 transitions. [2021-07-09 17:37:51,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:51,224 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1309 transitions. [2021-07-09 17:37:51,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:51,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:51,225 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:51,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:51,441 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:51,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:51,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1609295264, now seen corresponding path program 37 times [2021-07-09 17:37:51,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:51,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879971779] [2021-07-09 17:37:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:51,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:51,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879971779] [2021-07-09 17:37:51,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879971779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:51,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490687681] [2021-07-09 17:37:51,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:51,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:51,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:51,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490687681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:51,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:51,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-07-09 17:37:51,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789874890] [2021-07-09 17:37:51,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:37:51,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:51,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:37:51,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:37:51,713 INFO L87 Difference]: Start difference. First operand 433 states and 1309 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:51,991 INFO L93 Difference]: Finished difference Result 583 states and 1717 transitions. [2021-07-09 17:37:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:37:51,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:51,993 INFO L225 Difference]: With dead ends: 583 [2021-07-09 17:37:51,993 INFO L226 Difference]: Without dead ends: 531 [2021-07-09 17:37:51,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 229.8ms TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:37:51,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-07-09 17:37:51,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 395. [2021-07-09 17:37:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.0076142131979697) internal successors, (1185), 394 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1185 transitions. [2021-07-09 17:37:51,998 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1185 transitions. Word has length 21 [2021-07-09 17:37:51,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:51,998 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1185 transitions. [2021-07-09 17:37:51,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1185 transitions. [2021-07-09 17:37:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:51,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:51,999 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:52,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-07-09 17:37:52,215 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:52,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:52,215 INFO L82 PathProgramCache]: Analyzing trace with hash 927641802, now seen corresponding path program 38 times [2021-07-09 17:37:52,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:52,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864072862] [2021-07-09 17:37:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:37:52,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:52,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864072862] [2021-07-09 17:37:52,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864072862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:52,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225409385] [2021-07-09 17:37:52,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:52,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:37:52,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:52,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:52,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:52,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225409385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:52,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:52,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:37:52,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828736159] [2021-07-09 17:37:52,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:52,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:52,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:52,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:52,474 INFO L87 Difference]: Start difference. First operand 395 states and 1185 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:53,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:53,232 INFO L93 Difference]: Finished difference Result 659 states and 1867 transitions. [2021-07-09 17:37:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:37:53,232 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:53,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:53,234 INFO L225 Difference]: With dead ends: 659 [2021-07-09 17:37:53,234 INFO L226 Difference]: Without dead ends: 508 [2021-07-09 17:37:53,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 600.9ms TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:37:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-07-09 17:37:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 388. [2021-07-09 17:37:53,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.992248062015504) internal successors, (1158), 387 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1158 transitions. [2021-07-09 17:37:53,239 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1158 transitions. Word has length 21 [2021-07-09 17:37:53,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:53,240 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1158 transitions. [2021-07-09 17:37:53,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1158 transitions. [2021-07-09 17:37:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:53,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:53,240 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:53,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-07-09 17:37:53,457 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1063950666, now seen corresponding path program 39 times [2021-07-09 17:37:53,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:53,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220816693] [2021-07-09 17:37:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:53,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:53,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220816693] [2021-07-09 17:37:53,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220816693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:53,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696276890] [2021-07-09 17:37:53,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:53,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:37:53,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:53,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:53,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:53,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696276890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:53,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:53,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:37:53,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9902726] [2021-07-09 17:37:53,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:53,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:53,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:53,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:53,795 INFO L87 Difference]: Start difference. First operand 388 states and 1158 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:54,980 INFO L93 Difference]: Finished difference Result 733 states and 2120 transitions. [2021-07-09 17:37:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:37:54,981 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:54,982 INFO L225 Difference]: With dead ends: 733 [2021-07-09 17:37:54,982 INFO L226 Difference]: Without dead ends: 590 [2021-07-09 17:37:54,982 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1006.2ms TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:37:54,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-07-09 17:37:54,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 370. [2021-07-09 17:37:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.97289972899729) internal successors, (1097), 369 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:54,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1097 transitions. [2021-07-09 17:37:54,988 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1097 transitions. Word has length 21 [2021-07-09 17:37:54,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:54,988 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1097 transitions. [2021-07-09 17:37:54,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:54,988 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1097 transitions. [2021-07-09 17:37:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:54,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:54,988 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:55,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:55,205 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:55,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1824010934, now seen corresponding path program 40 times [2021-07-09 17:37:55,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:55,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280978005] [2021-07-09 17:37:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:55,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:55,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280978005] [2021-07-09 17:37:55,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280978005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:55,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24656730] [2021-07-09 17:37:55,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:55,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:37:55,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:55,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:55,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:55,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24656730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:55,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:55,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:37:55,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626086508] [2021-07-09 17:37:55,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:55,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:55,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:55,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:55,451 INFO L87 Difference]: Start difference. First operand 370 states and 1097 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:56,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:56,435 INFO L93 Difference]: Finished difference Result 858 states and 2494 transitions. [2021-07-09 17:37:56,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:37:56,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:56,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:56,437 INFO L225 Difference]: With dead ends: 858 [2021-07-09 17:37:56,437 INFO L226 Difference]: Without dead ends: 761 [2021-07-09 17:37:56,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 739.9ms TimeCoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:37:56,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-07-09 17:37:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 390. [2021-07-09 17:37:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.025706940874036) internal successors, (1177), 389 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1177 transitions. [2021-07-09 17:37:56,445 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1177 transitions. Word has length 21 [2021-07-09 17:37:56,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:56,445 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1177 transitions. [2021-07-09 17:37:56,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:56,445 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1177 transitions. [2021-07-09 17:37:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:56,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:56,446 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:56,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:56,661 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:56,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:56,662 INFO L82 PathProgramCache]: Analyzing trace with hash -223501882, now seen corresponding path program 41 times [2021-07-09 17:37:56,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:56,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285048770] [2021-07-09 17:37:56,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:56,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:56,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285048770] [2021-07-09 17:37:56,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285048770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:56,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452963611] [2021-07-09 17:37:56,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:56,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:37:56,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:56,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:56,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:56,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452963611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:56,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:56,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:37:56,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833245420] [2021-07-09 17:37:56,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:56,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:56,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:56,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:56,934 INFO L87 Difference]: Start difference. First operand 390 states and 1177 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:57,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:57,851 INFO L93 Difference]: Finished difference Result 851 states and 2515 transitions. [2021-07-09 17:37:57,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:37:57,852 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:57,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:57,853 INFO L225 Difference]: With dead ends: 851 [2021-07-09 17:37:57,853 INFO L226 Difference]: Without dead ends: 742 [2021-07-09 17:37:57,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 683.5ms TimeCoverageRelationStatistics Valid=273, Invalid=1133, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:37:57,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-07-09 17:37:57,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 400. [2021-07-09 17:37:57,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.0526315789473686) internal successors, (1218), 399 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1218 transitions. [2021-07-09 17:37:57,860 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1218 transitions. Word has length 21 [2021-07-09 17:37:57,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:57,860 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1218 transitions. [2021-07-09 17:37:57,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:57,860 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1218 transitions. [2021-07-09 17:37:57,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:57,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:57,860 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:58,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-07-09 17:37:58,076 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:58,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:58,077 INFO L82 PathProgramCache]: Analyzing trace with hash 59224522, now seen corresponding path program 42 times [2021-07-09 17:37:58,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:58,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955942867] [2021-07-09 17:37:58,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:58,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:58,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955942867] [2021-07-09 17:37:58,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955942867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:58,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245587323] [2021-07-09 17:37:58,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:58,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:37:58,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:37:58,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:58,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:37:58,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245587323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:58,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:58,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:37:58,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030058637] [2021-07-09 17:37:58,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:58,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:58,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:58,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:58,295 INFO L87 Difference]: Start difference. First operand 400 states and 1218 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:59,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:37:59,040 INFO L93 Difference]: Finished difference Result 777 states and 2233 transitions. [2021-07-09 17:37:59,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:37:59,040 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:37:59,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:37:59,041 INFO L225 Difference]: With dead ends: 777 [2021-07-09 17:37:59,041 INFO L226 Difference]: Without dead ends: 676 [2021-07-09 17:37:59,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 587.4ms TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:37:59,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-07-09 17:37:59,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 385. [2021-07-09 17:37:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.9817708333333335) internal successors, (1145), 384 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:59,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1145 transitions. [2021-07-09 17:37:59,047 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1145 transitions. Word has length 21 [2021-07-09 17:37:59,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:37:59,047 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1145 transitions. [2021-07-09 17:37:59,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:37:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1145 transitions. [2021-07-09 17:37:59,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:37:59,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:37:59,048 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:37:59,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:59,250 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:37:59,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:37:59,251 INFO L82 PathProgramCache]: Analyzing trace with hash -191892094, now seen corresponding path program 43 times [2021-07-09 17:37:59,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:37:59,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180207051] [2021-07-09 17:37:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:37:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:59,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:37:59,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180207051] [2021-07-09 17:37:59,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180207051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:59,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309351716] [2021-07-09 17:37:59,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:37:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:37:59,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:37:59,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:37:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:37:59,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309351716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:37:59,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:37:59,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:37:59,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354095205] [2021-07-09 17:37:59,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:37:59,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:37:59,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:37:59,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:37:59,435 INFO L87 Difference]: Start difference. First operand 385 states and 1145 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:00,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:00,093 INFO L93 Difference]: Finished difference Result 528 states and 1542 transitions. [2021-07-09 17:38:00,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:38:00,094 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:38:00,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:00,094 INFO L225 Difference]: With dead ends: 528 [2021-07-09 17:38:00,094 INFO L226 Difference]: Without dead ends: 482 [2021-07-09 17:38:00,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 511.1ms TimeCoverageRelationStatistics Valid=208, Invalid=848, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:38:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-09 17:38:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 304. [2021-07-09 17:38:00,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.953795379537954) internal successors, (895), 303 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:00,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 895 transitions. [2021-07-09 17:38:00,099 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 895 transitions. Word has length 21 [2021-07-09 17:38:00,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:00,099 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 895 transitions. [2021-07-09 17:38:00,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 895 transitions. [2021-07-09 17:38:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:00,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:00,100 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:00,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:00,303 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:00,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:00,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1148844402, now seen corresponding path program 44 times [2021-07-09 17:38:00,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:00,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636802008] [2021-07-09 17:38:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:00,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:38:00,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:00,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636802008] [2021-07-09 17:38:00,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636802008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:00,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139066794] [2021-07-09 17:38:00,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:00,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:00,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:00,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:00,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:00,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139066794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:00,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:00,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:38:00,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737930446] [2021-07-09 17:38:00,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:00,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:00,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:00,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:00,620 INFO L87 Difference]: Start difference. First operand 304 states and 895 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:01,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:01,324 INFO L93 Difference]: Finished difference Result 791 states and 2249 transitions. [2021-07-09 17:38:01,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:01,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:01,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:01,325 INFO L225 Difference]: With dead ends: 791 [2021-07-09 17:38:01,325 INFO L226 Difference]: Without dead ends: 673 [2021-07-09 17:38:01,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 719.0ms TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:01,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-07-09 17:38:01,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 311. [2021-07-09 17:38:01,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.97741935483871) internal successors, (923), 310 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 923 transitions. [2021-07-09 17:38:01,330 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 923 transitions. Word has length 22 [2021-07-09 17:38:01,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:01,330 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 923 transitions. [2021-07-09 17:38:01,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:01,330 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 923 transitions. [2021-07-09 17:38:01,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:01,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:01,331 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:01,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-07-09 17:38:01,547 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:01,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:01,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1439910460, now seen corresponding path program 45 times [2021-07-09 17:38:01,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:01,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634804991] [2021-07-09 17:38:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:38:01,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:01,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634804991] [2021-07-09 17:38:01,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634804991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:01,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340418139] [2021-07-09 17:38:01,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:01,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:01,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:01,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:38:01,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:38:01,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340418139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:01,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:01,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:38:01,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844774465] [2021-07-09 17:38:01,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:38:01,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:01,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:38:01,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:38:01,844 INFO L87 Difference]: Start difference. First operand 311 states and 923 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:02,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:02,080 INFO L93 Difference]: Finished difference Result 694 states and 1967 transitions. [2021-07-09 17:38:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:38:02,080 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:02,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:02,081 INFO L225 Difference]: With dead ends: 694 [2021-07-09 17:38:02,081 INFO L226 Difference]: Without dead ends: 607 [2021-07-09 17:38:02,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 294.7ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-07-09 17:38:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 302. [2021-07-09 17:38:02,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.956810631229236) internal successors, (890), 301 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 890 transitions. [2021-07-09 17:38:02,086 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 890 transitions. Word has length 22 [2021-07-09 17:38:02,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:02,086 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 890 transitions. [2021-07-09 17:38:02,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:02,086 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 890 transitions. [2021-07-09 17:38:02,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:02,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:02,087 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:02,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:02,303 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:02,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:02,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1043150932, now seen corresponding path program 46 times [2021-07-09 17:38:02,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:02,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497465040] [2021-07-09 17:38:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:02,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:02,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497465040] [2021-07-09 17:38:02,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497465040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:02,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453181027] [2021-07-09 17:38:02,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:02,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:02,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:02,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:02,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:02,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453181027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:02,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:02,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:38:02,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540720725] [2021-07-09 17:38:02,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:02,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:02,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:02,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:02,644 INFO L87 Difference]: Start difference. First operand 302 states and 890 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:03,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:03,392 INFO L93 Difference]: Finished difference Result 620 states and 1775 transitions. [2021-07-09 17:38:03,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:03,392 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:03,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:03,393 INFO L225 Difference]: With dead ends: 620 [2021-07-09 17:38:03,393 INFO L226 Difference]: Without dead ends: 510 [2021-07-09 17:38:03,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 760.9ms TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:38:03,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-07-09 17:38:03,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 269. [2021-07-09 17:38:03,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.966417910447761) internal successors, (795), 268 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:03,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 795 transitions. [2021-07-09 17:38:03,397 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 795 transitions. Word has length 22 [2021-07-09 17:38:03,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:03,397 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 795 transitions. [2021-07-09 17:38:03,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 795 transitions. [2021-07-09 17:38:03,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:03,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:03,398 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:03,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable630,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:03,615 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:03,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:03,615 INFO L82 PathProgramCache]: Analyzing trace with hash 942011964, now seen corresponding path program 47 times [2021-07-09 17:38:03,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:03,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837877644] [2021-07-09 17:38:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:38:03,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:03,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837877644] [2021-07-09 17:38:03,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837877644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:03,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766549922] [2021-07-09 17:38:03,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:03,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:38:03,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:03,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:03,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:03,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766549922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:03,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:03,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 17:38:03,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480587375] [2021-07-09 17:38:03,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:03,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:03,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:03,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:03,936 INFO L87 Difference]: Start difference. First operand 269 states and 795 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:05,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:05,507 INFO L93 Difference]: Finished difference Result 887 states and 2504 transitions. [2021-07-09 17:38:05,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:38:05,508 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:05,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:05,509 INFO L225 Difference]: With dead ends: 887 [2021-07-09 17:38:05,509 INFO L226 Difference]: Without dead ends: 635 [2021-07-09 17:38:05,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1451.3ms TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:38:05,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-07-09 17:38:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 269. [2021-07-09 17:38:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.9365671641791047) internal successors, (787), 268 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 787 transitions. [2021-07-09 17:38:05,513 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 787 transitions. Word has length 22 [2021-07-09 17:38:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:05,513 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 787 transitions. [2021-07-09 17:38:05,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 787 transitions. [2021-07-09 17:38:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:05,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:05,514 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:05,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:05,729 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:05,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:05,729 INFO L82 PathProgramCache]: Analyzing trace with hash 746481008, now seen corresponding path program 48 times [2021-07-09 17:38:05,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:05,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216105029] [2021-07-09 17:38:05,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:05,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:05,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216105029] [2021-07-09 17:38:05,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216105029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:05,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095413422] [2021-07-09 17:38:05,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:05,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:38:05,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:05,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:05,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:06,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:38:06,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:38:06,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,161 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-07-09 17:38:06,161 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-07-09 17:38:06,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:38:06,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:06,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:06,241 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:06,245 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:06,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:06,313 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:06,317 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:06,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:38:06,392 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-07-09 17:38:06,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:06,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:38:06,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:06,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,631 INFO L628 ElimStorePlain]: treesize reduction 20, result has 61.5 percent of original size [2021-07-09 17:38:06,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:38:06,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:06,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:06,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:06,646 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-07-09 17:38:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:06,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095413422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:06,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:06,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:38:06,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769247915] [2021-07-09 17:38:06,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:38:06,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:06,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:38:06,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:06,695 INFO L87 Difference]: Start difference. First operand 269 states and 787 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:07,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:07,437 INFO L93 Difference]: Finished difference Result 639 states and 1819 transitions. [2021-07-09 17:38:07,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:07,437 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:07,438 INFO L225 Difference]: With dead ends: 639 [2021-07-09 17:38:07,438 INFO L226 Difference]: Without dead ends: 521 [2021-07-09 17:38:07,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 785.1ms TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:38:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-09 17:38:07,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 290. [2021-07-09 17:38:07,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.98961937716263) internal successors, (864), 289 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 864 transitions. [2021-07-09 17:38:07,443 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 864 transitions. Word has length 22 [2021-07-09 17:38:07,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:07,443 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 864 transitions. [2021-07-09 17:38:07,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:07,443 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 864 transitions. [2021-07-09 17:38:07,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:07,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:07,443 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:07,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-07-09 17:38:07,653 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:07,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:07,653 INFO L82 PathProgramCache]: Analyzing trace with hash -959731426, now seen corresponding path program 49 times [2021-07-09 17:38:07,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:07,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857231761] [2021-07-09 17:38:07,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:07,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:07,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:07,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857231761] [2021-07-09 17:38:07,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857231761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:07,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514879921] [2021-07-09 17:38:07,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:07,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:07,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:08,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:38:08,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:38:08,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,159 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-07-09 17:38:08,160 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-07-09 17:38:08,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:08,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:08,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:08,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:08,240 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:08,244 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:08,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:38:08,311 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:08,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:38:08,375 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-07-09 17:38:08,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:08,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:08,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:38:08,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,672 INFO L628 ElimStorePlain]: treesize reduction 78, result has 46.2 percent of original size [2021-07-09 17:38:08,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:38:08,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:08,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:38:08,712 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:08,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:08,747 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:08,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:08,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:08,779 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-07-09 17:38:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:08,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514879921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:08,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:08,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:38:08,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866871468] [2021-07-09 17:38:08,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:38:08,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:08,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:38:08,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:08,861 INFO L87 Difference]: Start difference. First operand 290 states and 864 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:10,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:10,723 INFO L93 Difference]: Finished difference Result 703 states and 1960 transitions. [2021-07-09 17:38:10,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:38:10,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:10,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:10,724 INFO L225 Difference]: With dead ends: 703 [2021-07-09 17:38:10,724 INFO L226 Difference]: Without dead ends: 541 [2021-07-09 17:38:10,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1828.2ms TimeCoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:38:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-07-09 17:38:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 283. [2021-07-09 17:38:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.9645390070921986) internal successors, (836), 282 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 836 transitions. [2021-07-09 17:38:10,728 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 836 transitions. Word has length 22 [2021-07-09 17:38:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:10,728 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 836 transitions. [2021-07-09 17:38:10,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 836 transitions. [2021-07-09 17:38:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:10,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:10,729 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:10,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-07-09 17:38:10,935 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:10,935 INFO L82 PathProgramCache]: Analyzing trace with hash 205767280, now seen corresponding path program 50 times [2021-07-09 17:38:10,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:10,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850440952] [2021-07-09 17:38:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:11,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:11,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850440952] [2021-07-09 17:38:11,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850440952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:11,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579436098] [2021-07-09 17:38:11,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:11,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:11,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:11,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:11,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:11,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:11,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:11,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:11,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:38:11,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:11,514 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-09 17:38:11,515 INFO L628 ElimStorePlain]: treesize reduction 32, result has 79.7 percent of original size [2021-07-09 17:38:11,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:38:11,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:11,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:11,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-07-09 17:38:11,591 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:170, output treesize:120 [2021-07-09 17:38:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:11,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579436098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:11,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:11,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:38:11,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902086112] [2021-07-09 17:38:11,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:38:11,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:11,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:38:11,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:38:11,811 INFO L87 Difference]: Start difference. First operand 283 states and 836 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:12,359 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2021-07-09 17:38:12,706 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-07-09 17:38:12,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:12,988 INFO L93 Difference]: Finished difference Result 463 states and 1318 transitions. [2021-07-09 17:38:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:12,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:12,989 INFO L225 Difference]: With dead ends: 463 [2021-07-09 17:38:12,989 INFO L226 Difference]: Without dead ends: 323 [2021-07-09 17:38:12,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1235.3ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:38:12,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-07-09 17:38:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 276. [2021-07-09 17:38:12,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.938181818181818) internal successors, (808), 275 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 808 transitions. [2021-07-09 17:38:12,992 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 808 transitions. Word has length 22 [2021-07-09 17:38:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:12,992 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 808 transitions. [2021-07-09 17:38:12,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 808 transitions. [2021-07-09 17:38:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:12,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:12,993 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:13,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-07-09 17:38:13,193 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:13,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:13,194 INFO L82 PathProgramCache]: Analyzing trace with hash -388078088, now seen corresponding path program 51 times [2021-07-09 17:38:13,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:13,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879664009] [2021-07-09 17:38:13,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:13,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:13,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879664009] [2021-07-09 17:38:13,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879664009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:13,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949287840] [2021-07-09 17:38:13,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:13,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:13,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:13,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:13,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:13,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:13,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:13,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:38:13,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:13,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:13,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:13,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:38:13,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:13,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:38:13,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:13,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:13,510 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:13,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:13,513 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:13,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:13,516 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:13,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:13,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:13,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:38:13,520 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:13,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:38:13,522 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:13,585 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.3 percent of original size [2021-07-09 17:38:13,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:13,587 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:199, output treesize:66 [2021-07-09 17:38:13,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:13,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:13,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:13,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:38:13,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:13,783 INFO L628 ElimStorePlain]: treesize reduction 35, result has 47.8 percent of original size [2021-07-09 17:38:13,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:38:13,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:13,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:13,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:38:13,798 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-07-09 17:38:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:13,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949287840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:13,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:13,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:38:13,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842211639] [2021-07-09 17:38:13,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:38:13,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:13,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:38:13,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:13,841 INFO L87 Difference]: Start difference. First operand 276 states and 808 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:14,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:14,421 INFO L93 Difference]: Finished difference Result 730 states and 2080 transitions. [2021-07-09 17:38:14,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:14,421 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:14,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:14,422 INFO L225 Difference]: With dead ends: 730 [2021-07-09 17:38:14,422 INFO L226 Difference]: Without dead ends: 612 [2021-07-09 17:38:14,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 604.4ms TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:14,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-07-09 17:38:14,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 304. [2021-07-09 17:38:14,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.036303630363036) internal successors, (920), 303 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:14,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 920 transitions. [2021-07-09 17:38:14,429 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 920 transitions. Word has length 22 [2021-07-09 17:38:14,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:14,429 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 920 transitions. [2021-07-09 17:38:14,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:14,430 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 920 transitions. [2021-07-09 17:38:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:14,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:14,430 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:14,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-07-09 17:38:14,645 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:14,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:14,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2094290522, now seen corresponding path program 52 times [2021-07-09 17:38:14,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:14,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807393925] [2021-07-09 17:38:14,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:14,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:14,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807393925] [2021-07-09 17:38:14,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807393925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:14,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469985476] [2021-07-09 17:38:14,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:14,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:14,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:14,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:14,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:14,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:38:14,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:38:14,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:14,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:14,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:14,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:38:14,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:15,011 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.6 percent of original size [2021-07-09 17:38:15,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:38:15,013 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:132, output treesize:66 [2021-07-09 17:38:15,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:15,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:15,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:38:15,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:38:15,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:15,242 INFO L628 ElimStorePlain]: treesize reduction 57, result has 49.1 percent of original size [2021-07-09 17:38:15,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:38:15,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:15,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:15,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:38:15,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:38:15,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:38:15,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:38:15,298 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:24 [2021-07-09 17:38:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:15,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469985476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:15,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:15,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:38:15,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377738590] [2021-07-09 17:38:15,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:38:15,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:15,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:38:15,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:38:15,386 INFO L87 Difference]: Start difference. First operand 304 states and 920 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:16,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:16,748 INFO L93 Difference]: Finished difference Result 858 states and 2428 transitions. [2021-07-09 17:38:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:38:16,748 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:16,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:16,749 INFO L225 Difference]: With dead ends: 858 [2021-07-09 17:38:16,749 INFO L226 Difference]: Without dead ends: 643 [2021-07-09 17:38:16,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1338.5ms TimeCoverageRelationStatistics Valid=284, Invalid=838, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:38:16,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-07-09 17:38:16,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 317. [2021-07-09 17:38:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.990506329113924) internal successors, (945), 316 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:16,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 945 transitions. [2021-07-09 17:38:16,754 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 945 transitions. Word has length 22 [2021-07-09 17:38:16,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:16,754 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 945 transitions. [2021-07-09 17:38:16,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:16,754 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 945 transitions. [2021-07-09 17:38:16,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:16,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:16,754 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:16,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable798 [2021-07-09 17:38:16,965 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:16,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:16,965 INFO L82 PathProgramCache]: Analyzing trace with hash 129512560, now seen corresponding path program 53 times [2021-07-09 17:38:16,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:16,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514710765] [2021-07-09 17:38:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:17,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:17,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514710765] [2021-07-09 17:38:17,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514710765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:17,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763227529] [2021-07-09 17:38:17,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:17,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:17,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:17,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:17,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:17,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763227529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:17,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:17,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 17:38:17,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283235998] [2021-07-09 17:38:17,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:38:17,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:17,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:38:17,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:17,277 INFO L87 Difference]: Start difference. First operand 317 states and 945 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:17,985 INFO L93 Difference]: Finished difference Result 594 states and 1685 transitions. [2021-07-09 17:38:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:17,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:17,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:17,986 INFO L225 Difference]: With dead ends: 594 [2021-07-09 17:38:17,986 INFO L226 Difference]: Without dead ends: 435 [2021-07-09 17:38:17,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 716.3ms TimeCoverageRelationStatistics Valid=211, Invalid=719, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:38:17,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-09 17:38:17,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 304. [2021-07-09 17:38:17,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:17,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2021-07-09 17:38:17,990 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2021-07-09 17:38:17,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:17,991 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2021-07-09 17:38:17,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:17,991 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2021-07-09 17:38:17,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:17,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:17,991 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:18,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-07-09 17:38:18,207 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:18,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:18,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1694127950, now seen corresponding path program 54 times [2021-07-09 17:38:18,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:18,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858328978] [2021-07-09 17:38:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:18,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:18,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858328978] [2021-07-09 17:38:18,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858328978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:18,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416830942] [2021-07-09 17:38:18,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:18,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:38:18,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:18,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:18,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:18,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416830942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:18,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:18,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:18,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437087914] [2021-07-09 17:38:18,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:18,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:18,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:18,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:18,394 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:18,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:18,640 INFO L93 Difference]: Finished difference Result 485 states and 1424 transitions. [2021-07-09 17:38:18,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:18,640 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:18,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:18,641 INFO L225 Difference]: With dead ends: 485 [2021-07-09 17:38:18,641 INFO L226 Difference]: Without dead ends: 485 [2021-07-09 17:38:18,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:18,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-07-09 17:38:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 319. [2021-07-09 17:38:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:18,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-07-09 17:38:18,662 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-07-09 17:38:18,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:18,662 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-07-09 17:38:18,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:18,663 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-07-09 17:38:18,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:18,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:18,663 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:18,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable855,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:18,879 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:18,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:18,879 INFO L82 PathProgramCache]: Analyzing trace with hash -541317644, now seen corresponding path program 55 times [2021-07-09 17:38:18,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:18,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929948820] [2021-07-09 17:38:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:18,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:18,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929948820] [2021-07-09 17:38:18,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929948820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:18,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486302254] [2021-07-09 17:38:18,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:19,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:19,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:19,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:19,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486302254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:19,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:19,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:19,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140306801] [2021-07-09 17:38:19,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:19,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:19,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:19,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:19,120 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:19,420 INFO L93 Difference]: Finished difference Result 594 states and 1723 transitions. [2021-07-09 17:38:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:19,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:19,421 INFO L225 Difference]: With dead ends: 594 [2021-07-09 17:38:19,422 INFO L226 Difference]: Without dead ends: 594 [2021-07-09 17:38:19,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:38:19,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-07-09 17:38:19,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 331. [2021-07-09 17:38:19,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:19,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2021-07-09 17:38:19,426 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 22 [2021-07-09 17:38:19,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:19,426 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2021-07-09 17:38:19,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:19,426 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2021-07-09 17:38:19,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:19,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:19,427 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:19,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable859,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:19,641 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:19,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:19,641 INFO L82 PathProgramCache]: Analyzing trace with hash 953285320, now seen corresponding path program 56 times [2021-07-09 17:38:19,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:19,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979152045] [2021-07-09 17:38:19,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:19,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:19,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979152045] [2021-07-09 17:38:19,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979152045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:19,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395363760] [2021-07-09 17:38:19,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:19,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:19,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:19,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:19,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:19,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395363760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:19,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:19,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:19,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018564446] [2021-07-09 17:38:19,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:19,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:19,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:19,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:19,847 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:20,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:20,095 INFO L93 Difference]: Finished difference Result 573 states and 1658 transitions. [2021-07-09 17:38:20,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:20,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:20,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:20,096 INFO L225 Difference]: With dead ends: 573 [2021-07-09 17:38:20,096 INFO L226 Difference]: Without dead ends: 563 [2021-07-09 17:38:20,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:20,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-07-09 17:38:20,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 338. [2021-07-09 17:38:20,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.964391691394659) internal successors, (999), 337 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 999 transitions. [2021-07-09 17:38:20,101 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 999 transitions. Word has length 22 [2021-07-09 17:38:20,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:20,101 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 999 transitions. [2021-07-09 17:38:20,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:20,101 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 999 transitions. [2021-07-09 17:38:20,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:20,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:20,102 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:20,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable865,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:20,310 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:20,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:20,311 INFO L82 PathProgramCache]: Analyzing trace with hash 634173000, now seen corresponding path program 57 times [2021-07-09 17:38:20,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:20,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467818131] [2021-07-09 17:38:20,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:20,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:20,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467818131] [2021-07-09 17:38:20,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467818131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:20,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102726582] [2021-07-09 17:38:20,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:20,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:20,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:20,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:20,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:20,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102726582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:20,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:20,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:20,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075105336] [2021-07-09 17:38:20,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:20,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:20,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:20,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:20,546 INFO L87 Difference]: Start difference. First operand 338 states and 999 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:20,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:20,834 INFO L93 Difference]: Finished difference Result 506 states and 1487 transitions. [2021-07-09 17:38:20,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:20,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:20,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:20,835 INFO L225 Difference]: With dead ends: 506 [2021-07-09 17:38:20,835 INFO L226 Difference]: Without dead ends: 506 [2021-07-09 17:38:20,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-07-09 17:38:20,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 319. [2021-07-09 17:38:20,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-07-09 17:38:20,839 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-07-09 17:38:20,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:20,839 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-07-09 17:38:20,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-07-09 17:38:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:20,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:20,840 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:21,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-07-09 17:38:21,056 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:21,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:21,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1424442098, now seen corresponding path program 58 times [2021-07-09 17:38:21,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:21,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877314263] [2021-07-09 17:38:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:21,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:21,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877314263] [2021-07-09 17:38:21,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877314263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:21,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917819902] [2021-07-09 17:38:21,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:21,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:21,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:21,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:21,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:21,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917819902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:21,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:21,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:21,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750646443] [2021-07-09 17:38:21,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:21,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:21,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:21,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:21,295 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:21,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:21,592 INFO L93 Difference]: Finished difference Result 458 states and 1333 transitions. [2021-07-09 17:38:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:21,592 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:21,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:21,593 INFO L225 Difference]: With dead ends: 458 [2021-07-09 17:38:21,593 INFO L226 Difference]: Without dead ends: 458 [2021-07-09 17:38:21,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:38:21,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-07-09 17:38:21,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 328. [2021-07-09 17:38:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9663608562691133) internal successors, (970), 327 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:21,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 970 transitions. [2021-07-09 17:38:21,597 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 970 transitions. Word has length 22 [2021-07-09 17:38:21,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:21,597 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 970 transitions. [2021-07-09 17:38:21,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:21,597 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 970 transitions. [2021-07-09 17:38:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:21,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:21,597 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:21,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable874,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:21,813 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:21,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:21,814 INFO L82 PathProgramCache]: Analyzing trace with hash 70160866, now seen corresponding path program 59 times [2021-07-09 17:38:21,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:21,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288537401] [2021-07-09 17:38:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:21,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:21,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288537401] [2021-07-09 17:38:21,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288537401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:21,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742023541] [2021-07-09 17:38:21,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:21,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:21,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:21,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:21,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:22,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742023541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:22,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:22,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:22,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15235964] [2021-07-09 17:38:22,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:22,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:22,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:22,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:22,053 INFO L87 Difference]: Start difference. First operand 328 states and 970 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:22,298 INFO L93 Difference]: Finished difference Result 475 states and 1370 transitions. [2021-07-09 17:38:22,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:38:22,298 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:22,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:22,299 INFO L225 Difference]: With dead ends: 475 [2021-07-09 17:38:22,299 INFO L226 Difference]: Without dead ends: 465 [2021-07-09 17:38:22,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:38:22,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-07-09 17:38:22,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 325. [2021-07-09 17:38:22,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.95679012345679) internal successors, (958), 324 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 958 transitions. [2021-07-09 17:38:22,303 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 958 transitions. Word has length 22 [2021-07-09 17:38:22,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:22,303 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 958 transitions. [2021-07-09 17:38:22,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,303 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 958 transitions. [2021-07-09 17:38:22,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:22,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:22,304 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:22,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable879 [2021-07-09 17:38:22,519 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:22,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:22,520 INFO L82 PathProgramCache]: Analyzing trace with hash 495108076, now seen corresponding path program 60 times [2021-07-09 17:38:22,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:22,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54490658] [2021-07-09 17:38:22,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:22,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:22,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54490658] [2021-07-09 17:38:22,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54490658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:22,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149762572] [2021-07-09 17:38:22,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:22,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:38:22,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:22,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:22,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:22,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149762572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:22,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:22,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:22,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94362925] [2021-07-09 17:38:22,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:22,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:22,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:22,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:22,723 INFO L87 Difference]: Start difference. First operand 325 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:22,895 INFO L93 Difference]: Finished difference Result 364 states and 1056 transitions. [2021-07-09 17:38:22,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:38:22,896 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:22,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:22,896 INFO L225 Difference]: With dead ends: 364 [2021-07-09 17:38:22,896 INFO L226 Difference]: Without dead ends: 344 [2021-07-09 17:38:22,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:38:22,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-07-09 17:38:22,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 322. [2021-07-09 17:38:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9470404984423677) internal successors, (946), 321 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 946 transitions. [2021-07-09 17:38:22,900 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 946 transitions. Word has length 22 [2021-07-09 17:38:22,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:22,900 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 946 transitions. [2021-07-09 17:38:22,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 946 transitions. [2021-07-09 17:38:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:22,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:22,901 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:23,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable885,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:23,117 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:23,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:23,117 INFO L82 PathProgramCache]: Analyzing trace with hash 656029498, now seen corresponding path program 61 times [2021-07-09 17:38:23,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:23,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5419193] [2021-07-09 17:38:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:23,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:23,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5419193] [2021-07-09 17:38:23,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5419193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:23,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858781791] [2021-07-09 17:38:23,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:23,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:23,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:23,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858781791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:23,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:23,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:23,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850967611] [2021-07-09 17:38:23,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:23,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:23,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:23,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:23,373 INFO L87 Difference]: Start difference. First operand 322 states and 946 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:23,607 INFO L93 Difference]: Finished difference Result 488 states and 1415 transitions. [2021-07-09 17:38:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:23,607 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:23,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:23,608 INFO L225 Difference]: With dead ends: 488 [2021-07-09 17:38:23,608 INFO L226 Difference]: Without dead ends: 488 [2021-07-09 17:38:23,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-07-09 17:38:23,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 334. [2021-07-09 17:38:23,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.984984984984985) internal successors, (994), 333 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:23,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 994 transitions. [2021-07-09 17:38:23,612 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 994 transitions. Word has length 22 [2021-07-09 17:38:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:23,612 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 994 transitions. [2021-07-09 17:38:23,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:23,613 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 994 transitions. [2021-07-09 17:38:23,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:23,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:23,613 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:23,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-07-09 17:38:23,829 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:23,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:23,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2144334834, now seen corresponding path program 62 times [2021-07-09 17:38:23,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:23,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275535031] [2021-07-09 17:38:23,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:23,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:23,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275535031] [2021-07-09 17:38:23,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275535031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:23,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783178731] [2021-07-09 17:38:23,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:23,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:23,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:23,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:23,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:24,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783178731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:24,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:24,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:24,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067762403] [2021-07-09 17:38:24,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:24,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:24,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:24,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:24,063 INFO L87 Difference]: Start difference. First operand 334 states and 994 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:24,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:24,238 INFO L93 Difference]: Finished difference Result 473 states and 1368 transitions. [2021-07-09 17:38:24,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:38:24,238 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:24,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:24,239 INFO L225 Difference]: With dead ends: 473 [2021-07-09 17:38:24,239 INFO L226 Difference]: Without dead ends: 463 [2021-07-09 17:38:24,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:38:24,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-07-09 17:38:24,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 341. [2021-07-09 17:38:24,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9647058823529413) internal successors, (1008), 340 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:24,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1008 transitions. [2021-07-09 17:38:24,243 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1008 transitions. Word has length 22 [2021-07-09 17:38:24,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:24,243 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1008 transitions. [2021-07-09 17:38:24,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:24,244 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1008 transitions. [2021-07-09 17:38:24,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:24,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:24,244 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:24,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable894,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:24,460 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:24,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:24,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1831520142, now seen corresponding path program 63 times [2021-07-09 17:38:24,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:24,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107938561] [2021-07-09 17:38:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:24,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:24,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107938561] [2021-07-09 17:38:24,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107938561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:24,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718405730] [2021-07-09 17:38:24,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:24,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:24,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:24,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:24,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:24,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718405730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:24,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:24,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:24,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579712181] [2021-07-09 17:38:24,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:24,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:24,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:24,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:24,694 INFO L87 Difference]: Start difference. First operand 341 states and 1008 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:24,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:24,864 INFO L93 Difference]: Finished difference Result 400 states and 1179 transitions. [2021-07-09 17:38:24,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:24,865 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:24,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:24,865 INFO L225 Difference]: With dead ends: 400 [2021-07-09 17:38:24,866 INFO L226 Difference]: Without dead ends: 400 [2021-07-09 17:38:24,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:38:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-09 17:38:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 319. [2021-07-09 17:38:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:24,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-07-09 17:38:24,870 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-07-09 17:38:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:24,870 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-07-09 17:38:24,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-07-09 17:38:24,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:24,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:24,870 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:25,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:25,088 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:25,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:25,089 INFO L82 PathProgramCache]: Analyzing trace with hash -640453132, now seen corresponding path program 64 times [2021-07-09 17:38:25,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:25,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932934010] [2021-07-09 17:38:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:25,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:25,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932934010] [2021-07-09 17:38:25,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932934010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:25,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068387946] [2021-07-09 17:38:25,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:25,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:25,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:25,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:25,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:25,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068387946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:25,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:25,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:25,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154735423] [2021-07-09 17:38:25,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:25,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:25,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:25,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:25,295 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:25,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:25,501 INFO L93 Difference]: Finished difference Result 563 states and 1637 transitions. [2021-07-09 17:38:25,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:25,502 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:25,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:25,503 INFO L225 Difference]: With dead ends: 563 [2021-07-09 17:38:25,503 INFO L226 Difference]: Without dead ends: 563 [2021-07-09 17:38:25,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:38:25,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-07-09 17:38:25,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 337. [2021-07-09 17:38:25,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9851190476190474) internal successors, (1003), 336 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:25,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1003 transitions. [2021-07-09 17:38:25,507 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1003 transitions. Word has length 22 [2021-07-09 17:38:25,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:25,507 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1003 transitions. [2021-07-09 17:38:25,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:25,507 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1003 transitions. [2021-07-09 17:38:25,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:25,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:25,508 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:25,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable903 [2021-07-09 17:38:25,724 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:25,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:25,724 INFO L82 PathProgramCache]: Analyzing trace with hash 854149832, now seen corresponding path program 65 times [2021-07-09 17:38:25,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:25,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131273594] [2021-07-09 17:38:25,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:25,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:25,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:25,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131273594] [2021-07-09 17:38:25,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131273594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:25,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427893542] [2021-07-09 17:38:25,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:25,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:25,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:25,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:25,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:26,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427893542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:26,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:26,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:26,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245500025] [2021-07-09 17:38:26,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:26,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:26,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:26,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:26,013 INFO L87 Difference]: Start difference. First operand 337 states and 1003 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:26,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:26,560 INFO L93 Difference]: Finished difference Result 595 states and 1719 transitions. [2021-07-09 17:38:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:38:26,561 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:26,562 INFO L225 Difference]: With dead ends: 595 [2021-07-09 17:38:26,562 INFO L226 Difference]: Without dead ends: 585 [2021-07-09 17:38:26,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:38:26,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-09 17:38:26,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 334. [2021-07-09 17:38:26,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.975975975975976) internal successors, (991), 333 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 991 transitions. [2021-07-09 17:38:26,567 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 991 transitions. Word has length 22 [2021-07-09 17:38:26,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:26,567 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 991 transitions. [2021-07-09 17:38:26,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:26,567 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 991 transitions. [2021-07-09 17:38:26,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:26,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:26,567 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:26,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable909 [2021-07-09 17:38:26,783 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:26,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1279097042, now seen corresponding path program 66 times [2021-07-09 17:38:26,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:26,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278201922] [2021-07-09 17:38:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:26,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:26,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278201922] [2021-07-09 17:38:26,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278201922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:26,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508776284] [2021-07-09 17:38:26,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:26,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:38:26,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:26,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:26,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:26,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508776284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:26,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:26,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:26,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004598403] [2021-07-09 17:38:26,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:26,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:26,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:26,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:26,996 INFO L87 Difference]: Start difference. First operand 334 states and 991 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:27,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:27,304 INFO L93 Difference]: Finished difference Result 572 states and 1665 transitions. [2021-07-09 17:38:27,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:38:27,304 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:27,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:27,305 INFO L225 Difference]: With dead ends: 572 [2021-07-09 17:38:27,305 INFO L226 Difference]: Without dead ends: 552 [2021-07-09 17:38:27,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 239.0ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:27,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-07-09 17:38:27,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 331. [2021-07-09 17:38:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.966666666666667) internal successors, (979), 330 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 979 transitions. [2021-07-09 17:38:27,310 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 979 transitions. Word has length 22 [2021-07-09 17:38:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:27,310 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 979 transitions. [2021-07-09 17:38:27,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:27,310 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 979 transitions. [2021-07-09 17:38:27,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:27,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:27,311 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:27,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable915,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:27,526 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:27,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:27,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1244273694, now seen corresponding path program 67 times [2021-07-09 17:38:27,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:27,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740421796] [2021-07-09 17:38:27,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:27,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:27,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740421796] [2021-07-09 17:38:27,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740421796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:27,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040339385] [2021-07-09 17:38:27,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:27,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:27,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:27,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040339385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:27,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:27,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:27,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561845730] [2021-07-09 17:38:27,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:27,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:27,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:27,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:27,821 INFO L87 Difference]: Start difference. First operand 331 states and 979 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:28,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:28,062 INFO L93 Difference]: Finished difference Result 515 states and 1495 transitions. [2021-07-09 17:38:28,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:28,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:28,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:28,063 INFO L225 Difference]: With dead ends: 515 [2021-07-09 17:38:28,063 INFO L226 Difference]: Without dead ends: 479 [2021-07-09 17:38:28,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:38:28,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-07-09 17:38:28,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 325. [2021-07-09 17:38:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.947530864197531) internal successors, (955), 324 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 955 transitions. [2021-07-09 17:38:28,068 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 955 transitions. Word has length 22 [2021-07-09 17:38:28,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:28,068 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 955 transitions. [2021-07-09 17:38:28,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:28,068 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 955 transitions. [2021-07-09 17:38:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:28,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:28,068 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:28,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable918,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:28,284 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:28,285 INFO L82 PathProgramCache]: Analyzing trace with hash 697114082, now seen corresponding path program 68 times [2021-07-09 17:38:28,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:28,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901748758] [2021-07-09 17:38:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:28,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:28,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901748758] [2021-07-09 17:38:28,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901748758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:28,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356742974] [2021-07-09 17:38:28,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:28,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:28,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:28,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:28,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:28,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356742974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:28,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:28,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:28,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623457887] [2021-07-09 17:38:28,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:28,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:28,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:28,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:28,492 INFO L87 Difference]: Start difference. First operand 325 states and 955 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:28,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:28,637 INFO L93 Difference]: Finished difference Result 461 states and 1343 transitions. [2021-07-09 17:38:28,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:38:28,637 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:28,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:28,638 INFO L225 Difference]: With dead ends: 461 [2021-07-09 17:38:28,638 INFO L226 Difference]: Without dead ends: 461 [2021-07-09 17:38:28,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:38:28,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-07-09 17:38:28,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 334. [2021-07-09 17:38:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.966966966966967) internal successors, (988), 333 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:28,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 988 transitions. [2021-07-09 17:38:28,642 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 988 transitions. Word has length 22 [2021-07-09 17:38:28,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:28,642 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 988 transitions. [2021-07-09 17:38:28,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:28,642 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 988 transitions. [2021-07-09 17:38:28,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:28,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:28,643 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:28,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:28,844 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:28,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:28,845 INFO L82 PathProgramCache]: Analyzing trace with hash -2103250250, now seen corresponding path program 69 times [2021-07-09 17:38:28,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:28,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626223466] [2021-07-09 17:38:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:28,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:28,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626223466] [2021-07-09 17:38:28,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626223466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:28,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983989301] [2021-07-09 17:38:28,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:28,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:28,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:28,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:28,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:29,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983989301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:29,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:29,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:29,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496792336] [2021-07-09 17:38:29,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:29,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:29,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:29,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:29,055 INFO L87 Difference]: Start difference. First operand 334 states and 988 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:29,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:29,327 INFO L93 Difference]: Finished difference Result 492 states and 1422 transitions. [2021-07-09 17:38:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:29,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:29,328 INFO L225 Difference]: With dead ends: 492 [2021-07-09 17:38:29,328 INFO L226 Difference]: Without dead ends: 482 [2021-07-09 17:38:29,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 231.7ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:38:29,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-09 17:38:29,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 331. [2021-07-09 17:38:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9575757575757575) internal successors, (976), 330 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 976 transitions. [2021-07-09 17:38:29,336 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 976 transitions. Word has length 22 [2021-07-09 17:38:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:29,336 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 976 transitions. [2021-07-09 17:38:29,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 976 transitions. [2021-07-09 17:38:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:29,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:29,337 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:29,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable928 [2021-07-09 17:38:29,541 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:29,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:29,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1678303040, now seen corresponding path program 70 times [2021-07-09 17:38:29,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:29,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922947796] [2021-07-09 17:38:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:29,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:29,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922947796] [2021-07-09 17:38:29,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922947796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:29,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397185234] [2021-07-09 17:38:29,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:29,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:29,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:29,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:29,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:29,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397185234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:29,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:29,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:29,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400572465] [2021-07-09 17:38:29,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:29,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:29,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:29,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:29,737 INFO L87 Difference]: Start difference. First operand 331 states and 976 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:29,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:29,934 INFO L93 Difference]: Finished difference Result 446 states and 1303 transitions. [2021-07-09 17:38:29,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:29,934 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:29,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:29,935 INFO L225 Difference]: With dead ends: 446 [2021-07-09 17:38:29,935 INFO L226 Difference]: Without dead ends: 426 [2021-07-09 17:38:29,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:38:29,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-07-09 17:38:29,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2021-07-09 17:38:29,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.948012232415902) internal successors, (964), 327 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:29,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 964 transitions. [2021-07-09 17:38:29,939 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 964 transitions. Word has length 22 [2021-07-09 17:38:29,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:29,939 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 964 transitions. [2021-07-09 17:38:29,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:29,939 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 964 transitions. [2021-07-09 17:38:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:29,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:29,940 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:30,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:30,145 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:30,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:30,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1517381618, now seen corresponding path program 71 times [2021-07-09 17:38:30,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:30,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385573831] [2021-07-09 17:38:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:30,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:30,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385573831] [2021-07-09 17:38:30,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385573831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:30,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744425806] [2021-07-09 17:38:30,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:30,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:30,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:30,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:30,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:30,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744425806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:30,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:30,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:30,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935525968] [2021-07-09 17:38:30,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:30,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:30,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:30,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:30,371 INFO L87 Difference]: Start difference. First operand 328 states and 964 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:30,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:30,663 INFO L93 Difference]: Finished difference Result 502 states and 1458 transitions. [2021-07-09 17:38:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:30,663 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:30,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:30,664 INFO L225 Difference]: With dead ends: 502 [2021-07-09 17:38:30,664 INFO L226 Difference]: Without dead ends: 502 [2021-07-09 17:38:30,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:30,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-07-09 17:38:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 340. [2021-07-09 17:38:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9852507374631267) internal successors, (1012), 339 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1012 transitions. [2021-07-09 17:38:30,669 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1012 transitions. Word has length 22 [2021-07-09 17:38:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:30,669 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1012 transitions. [2021-07-09 17:38:30,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1012 transitions. [2021-07-09 17:38:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:30,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:30,669 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:30,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:30,885 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:30,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:30,885 INFO L82 PathProgramCache]: Analyzing trace with hash -22778654, now seen corresponding path program 72 times [2021-07-09 17:38:30,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:30,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388687115] [2021-07-09 17:38:30,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:30,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:30,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388687115] [2021-07-09 17:38:30,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388687115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:30,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587532218] [2021-07-09 17:38:30,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:30,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:38:30,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:30,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:30,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:31,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587532218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:31,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:31,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:31,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305198292] [2021-07-09 17:38:31,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:31,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:31,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:31,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:31,103 INFO L87 Difference]: Start difference. First operand 340 states and 1012 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:31,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:31,293 INFO L93 Difference]: Finished difference Result 490 states and 1420 transitions. [2021-07-09 17:38:31,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:38:31,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:31,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:31,294 INFO L225 Difference]: With dead ends: 490 [2021-07-09 17:38:31,294 INFO L226 Difference]: Without dead ends: 480 [2021-07-09 17:38:31,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 166.5ms TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:38:31,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-07-09 17:38:31,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 347. [2021-07-09 17:38:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.9653179190751446) internal successors, (1026), 346 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:31,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1026 transitions. [2021-07-09 17:38:31,299 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1026 transitions. Word has length 22 [2021-07-09 17:38:31,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:31,299 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1026 transitions. [2021-07-09 17:38:31,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:31,299 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1026 transitions. [2021-07-09 17:38:31,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:31,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:31,300 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:31,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable943,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:31,516 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:31,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:31,516 INFO L82 PathProgramCache]: Analyzing trace with hash -341890974, now seen corresponding path program 73 times [2021-07-09 17:38:31,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:31,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677272520] [2021-07-09 17:38:31,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:31,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:31,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677272520] [2021-07-09 17:38:31,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677272520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:31,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156658258] [2021-07-09 17:38:31,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:31,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:31,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:31,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156658258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:31,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:31,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:31,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318448937] [2021-07-09 17:38:31,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:31,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:31,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:31,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:31,717 INFO L87 Difference]: Start difference. First operand 347 states and 1026 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:31,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:31,868 INFO L93 Difference]: Finished difference Result 414 states and 1222 transitions. [2021-07-09 17:38:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:38:31,868 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:31,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:31,869 INFO L225 Difference]: With dead ends: 414 [2021-07-09 17:38:31,869 INFO L226 Difference]: Without dead ends: 414 [2021-07-09 17:38:31,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:38:31,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-09 17:38:31,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 319. [2021-07-09 17:38:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-07-09 17:38:31,873 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-07-09 17:38:31,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:31,873 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-07-09 17:38:31,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:31,873 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-07-09 17:38:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:31,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:31,874 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:32,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:32,076 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:32,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:32,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1055430800, now seen corresponding path program 74 times [2021-07-09 17:38:32,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:32,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745323035] [2021-07-09 17:38:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:32,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:32,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745323035] [2021-07-09 17:38:32,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745323035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:32,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185526465] [2021-07-09 17:38:32,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:32,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:32,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:32,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:32,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:32,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185526465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:32,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:32,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:32,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163303772] [2021-07-09 17:38:32,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:32,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:32,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:32,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:32,287 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:32,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:32,530 INFO L93 Difference]: Finished difference Result 554 states and 1630 transitions. [2021-07-09 17:38:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:32,531 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:32,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:32,531 INFO L225 Difference]: With dead ends: 554 [2021-07-09 17:38:32,531 INFO L226 Difference]: Without dead ends: 554 [2021-07-09 17:38:32,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-09 17:38:32,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 326. [2021-07-09 17:38:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9476923076923076) internal successors, (958), 325 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 958 transitions. [2021-07-09 17:38:32,536 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 958 transitions. Word has length 22 [2021-07-09 17:38:32,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:32,536 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 958 transitions. [2021-07-09 17:38:32,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:32,536 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 958 transitions. [2021-07-09 17:38:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:32,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:32,537 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:32,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable952,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:32,750 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:32,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:32,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1004090902, now seen corresponding path program 75 times [2021-07-09 17:38:32,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:32,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136287144] [2021-07-09 17:38:32,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:32,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:32,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136287144] [2021-07-09 17:38:32,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136287144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:32,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926132978] [2021-07-09 17:38:32,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:32,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:32,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:32,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:32,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:32,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926132978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:32,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:32,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:32,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368825143] [2021-07-09 17:38:32,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:32,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:32,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:32,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:32,989 INFO L87 Difference]: Start difference. First operand 326 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:33,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:33,380 INFO L93 Difference]: Finished difference Result 651 states and 1893 transitions. [2021-07-09 17:38:33,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:33,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:33,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:33,381 INFO L225 Difference]: With dead ends: 651 [2021-07-09 17:38:33,381 INFO L226 Difference]: Without dead ends: 651 [2021-07-09 17:38:33,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 329.4ms TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:38:33,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-07-09 17:38:33,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 338. [2021-07-09 17:38:33,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9851632047477743) internal successors, (1006), 337 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:33,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1006 transitions. [2021-07-09 17:38:33,386 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1006 transitions. Word has length 22 [2021-07-09 17:38:33,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:33,387 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1006 transitions. [2021-07-09 17:38:33,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:33,387 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1006 transitions. [2021-07-09 17:38:33,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:33,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:33,387 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:33,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:33,604 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:33,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:33,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1796273430, now seen corresponding path program 76 times [2021-07-09 17:38:33,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:33,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398796432] [2021-07-09 17:38:33,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:33,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:33,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398796432] [2021-07-09 17:38:33,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398796432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:33,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28052786] [2021-07-09 17:38:33,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:33,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:33,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:33,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:33,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:33,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28052786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:33,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:33,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:33,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208325485] [2021-07-09 17:38:33,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:33,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:33,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:33,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:33,836 INFO L87 Difference]: Start difference. First operand 338 states and 1006 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:34,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:34,152 INFO L93 Difference]: Finished difference Result 642 states and 1864 transitions. [2021-07-09 17:38:34,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:34,153 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:34,154 INFO L225 Difference]: With dead ends: 642 [2021-07-09 17:38:34,154 INFO L226 Difference]: Without dead ends: 632 [2021-07-09 17:38:34,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:34,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-07-09 17:38:34,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 345. [2021-07-09 17:38:34,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.9651162790697674) internal successors, (1020), 344 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1020 transitions. [2021-07-09 17:38:34,159 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1020 transitions. Word has length 22 [2021-07-09 17:38:34,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:34,159 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1020 transitions. [2021-07-09 17:38:34,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:34,159 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1020 transitions. [2021-07-09 17:38:34,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:34,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:34,159 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:34,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-07-09 17:38:34,376 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:34,376 INFO L82 PathProgramCache]: Analyzing trace with hash -2115385750, now seen corresponding path program 77 times [2021-07-09 17:38:34,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:34,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135191149] [2021-07-09 17:38:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:34,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:34,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135191149] [2021-07-09 17:38:34,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135191149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:34,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849371820] [2021-07-09 17:38:34,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:34,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:34,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:34,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:34,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:34,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849371820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:34,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:34,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:34,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256763756] [2021-07-09 17:38:34,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:34,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:34,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:34,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:34,611 INFO L87 Difference]: Start difference. First operand 345 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:34,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:34,903 INFO L93 Difference]: Finished difference Result 560 states and 1648 transitions. [2021-07-09 17:38:34,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:34,903 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:34,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:34,904 INFO L225 Difference]: With dead ends: 560 [2021-07-09 17:38:34,904 INFO L226 Difference]: Without dead ends: 560 [2021-07-09 17:38:34,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 253.3ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:34,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-07-09 17:38:34,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 323. [2021-07-09 17:38:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9472049689440993) internal successors, (949), 322 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 949 transitions. [2021-07-09 17:38:34,908 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 949 transitions. Word has length 22 [2021-07-09 17:38:34,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:34,909 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 949 transitions. [2021-07-09 17:38:34,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:34,909 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 949 transitions. [2021-07-09 17:38:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:34,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:34,909 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:35,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable966,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:35,124 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:35,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:35,124 INFO L82 PathProgramCache]: Analyzing trace with hash 120966448, now seen corresponding path program 78 times [2021-07-09 17:38:35,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:35,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600572899] [2021-07-09 17:38:35,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:35,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:35,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600572899] [2021-07-09 17:38:35,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600572899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:35,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282552344] [2021-07-09 17:38:35,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:35,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:38:35,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:35,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:35,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:35,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282552344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:35,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:35,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:35,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49120918] [2021-07-09 17:38:35,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:35,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:35,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:35,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:35,389 INFO L87 Difference]: Start difference. First operand 323 states and 949 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:35,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:35,674 INFO L93 Difference]: Finished difference Result 503 states and 1467 transitions. [2021-07-09 17:38:35,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:35,674 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:35,675 INFO L225 Difference]: With dead ends: 503 [2021-07-09 17:38:35,675 INFO L226 Difference]: Without dead ends: 503 [2021-07-09 17:38:35,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:35,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-07-09 17:38:35,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 332. [2021-07-09 17:38:35,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9667673716012084) internal successors, (982), 331 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 982 transitions. [2021-07-09 17:38:35,679 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 982 transitions. Word has length 22 [2021-07-09 17:38:35,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:35,679 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 982 transitions. [2021-07-09 17:38:35,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 982 transitions. [2021-07-09 17:38:35,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:35,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:35,680 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:35,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable970,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:35,896 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:35,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:35,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1615569412, now seen corresponding path program 79 times [2021-07-09 17:38:35,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:35,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064739595] [2021-07-09 17:38:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:35,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:35,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064739595] [2021-07-09 17:38:35,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064739595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:35,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516924154] [2021-07-09 17:38:35,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:36,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:36,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:36,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516924154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:36,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:36,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:36,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251158875] [2021-07-09 17:38:36,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:36,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:36,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:36,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:36,118 INFO L87 Difference]: Start difference. First operand 332 states and 982 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:36,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:36,398 INFO L93 Difference]: Finished difference Result 523 states and 1513 transitions. [2021-07-09 17:38:36,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:36,398 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:36,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:36,399 INFO L225 Difference]: With dead ends: 523 [2021-07-09 17:38:36,399 INFO L226 Difference]: Without dead ends: 513 [2021-07-09 17:38:36,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 235.4ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:38:36,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-07-09 17:38:36,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 329. [2021-07-09 17:38:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.957317073170732) internal successors, (970), 328 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 970 transitions. [2021-07-09 17:38:36,404 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 970 transitions. Word has length 22 [2021-07-09 17:38:36,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:36,404 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 970 transitions. [2021-07-09 17:38:36,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:36,404 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 970 transitions. [2021-07-09 17:38:36,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:36,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:36,405 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:36,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-07-09 17:38:36,621 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:36,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:36,621 INFO L82 PathProgramCache]: Analyzing trace with hash 2040516622, now seen corresponding path program 80 times [2021-07-09 17:38:36,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:36,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945149006] [2021-07-09 17:38:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:36,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:36,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945149006] [2021-07-09 17:38:36,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945149006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:36,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876451017] [2021-07-09 17:38:36,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:36,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:36,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:36,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:36,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:36,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876451017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:36,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:36,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:36,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144209794] [2021-07-09 17:38:36,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:36,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:36,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:36,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:36,839 INFO L87 Difference]: Start difference. First operand 329 states and 970 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:37,052 INFO L93 Difference]: Finished difference Result 412 states and 1199 transitions. [2021-07-09 17:38:37,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:38:37,052 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:37,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:37,053 INFO L225 Difference]: With dead ends: 412 [2021-07-09 17:38:37,053 INFO L226 Difference]: Without dead ends: 392 [2021-07-09 17:38:37,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:38:37,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-07-09 17:38:37,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 326. [2021-07-09 17:38:37,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9476923076923076) internal successors, (958), 325 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 958 transitions. [2021-07-09 17:38:37,057 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 958 transitions. Word has length 22 [2021-07-09 17:38:37,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:37,057 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 958 transitions. [2021-07-09 17:38:37,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,057 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 958 transitions. [2021-07-09 17:38:37,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:37,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:37,058 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:37,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:37,274 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:37,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:37,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2093529252, now seen corresponding path program 81 times [2021-07-09 17:38:37,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:37,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139910980] [2021-07-09 17:38:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:37,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:37,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139910980] [2021-07-09 17:38:37,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139910980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:37,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368748936] [2021-07-09 17:38:37,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:37,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:37,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:37,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:37,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:37,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368748936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:37,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:37,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:37,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997274057] [2021-07-09 17:38:37,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:37,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:37,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:37,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:37,493 INFO L87 Difference]: Start difference. First operand 326 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:37,780 INFO L93 Difference]: Finished difference Result 551 states and 1603 transitions. [2021-07-09 17:38:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:37,781 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:37,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:37,782 INFO L225 Difference]: With dead ends: 551 [2021-07-09 17:38:37,782 INFO L226 Difference]: Without dead ends: 551 [2021-07-09 17:38:37,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:37,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-07-09 17:38:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 338. [2021-07-09 17:38:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9851632047477743) internal successors, (1006), 337 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1006 transitions. [2021-07-09 17:38:37,786 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1006 transitions. Word has length 22 [2021-07-09 17:38:37,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:37,786 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1006 transitions. [2021-07-09 17:38:37,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:37,787 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1006 transitions. [2021-07-09 17:38:37,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:37,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:37,787 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:38,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-07-09 17:38:38,003 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:38,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:38,003 INFO L82 PathProgramCache]: Analyzing trace with hash -598926288, now seen corresponding path program 82 times [2021-07-09 17:38:38,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:38,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843408279] [2021-07-09 17:38:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:38,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:38,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843408279] [2021-07-09 17:38:38,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843408279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:38,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807229305] [2021-07-09 17:38:38,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:38,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:38,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:38,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:38,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:38,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807229305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:38,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:38,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:38,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258526856] [2021-07-09 17:38:38,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:38,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:38,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:38,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:38,239 INFO L87 Difference]: Start difference. First operand 338 states and 1006 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:38,490 INFO L93 Difference]: Finished difference Result 530 states and 1538 transitions. [2021-07-09 17:38:38,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:38,490 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:38,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:38,491 INFO L225 Difference]: With dead ends: 530 [2021-07-09 17:38:38,491 INFO L226 Difference]: Without dead ends: 520 [2021-07-09 17:38:38,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:38:38,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-09 17:38:38,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 345. [2021-07-09 17:38:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.9651162790697674) internal successors, (1020), 344 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1020 transitions. [2021-07-09 17:38:38,496 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1020 transitions. Word has length 22 [2021-07-09 17:38:38,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:38,496 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1020 transitions. [2021-07-09 17:38:38,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:38,496 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1020 transitions. [2021-07-09 17:38:38,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:38,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:38,497 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:38,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable988,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:38,712 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:38,713 INFO L82 PathProgramCache]: Analyzing trace with hash -918038608, now seen corresponding path program 83 times [2021-07-09 17:38:38,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:38,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259759342] [2021-07-09 17:38:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:38,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:38,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259759342] [2021-07-09 17:38:38,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259759342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:38,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898687537] [2021-07-09 17:38:38,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:38,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:38,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:38,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:38,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:38,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898687537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:38,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:38,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:38,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804470646] [2021-07-09 17:38:38,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:38,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:38,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:38,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:38,934 INFO L87 Difference]: Start difference. First operand 345 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:39,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:39,257 INFO L93 Difference]: Finished difference Result 451 states and 1331 transitions. [2021-07-09 17:38:39,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:39,258 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:39,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:39,258 INFO L225 Difference]: With dead ends: 451 [2021-07-09 17:38:39,259 INFO L226 Difference]: Without dead ends: 451 [2021-07-09 17:38:39,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:38:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-09 17:38:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 320. [2021-07-09 17:38:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.946708463949843) internal successors, (940), 319 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 940 transitions. [2021-07-09 17:38:39,263 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 940 transitions. Word has length 22 [2021-07-09 17:38:39,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:39,263 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 940 transitions. [2021-07-09 17:38:39,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:39,263 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 940 transitions. [2021-07-09 17:38:39,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:39,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:39,263 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:39,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-07-09 17:38:39,479 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:39,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:39,479 INFO L82 PathProgramCache]: Analyzing trace with hash -132951768, now seen corresponding path program 84 times [2021-07-09 17:38:39,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:39,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645869919] [2021-07-09 17:38:39,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:39,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:39,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645869919] [2021-07-09 17:38:39,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645869919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:39,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932888467] [2021-07-09 17:38:39,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:39,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:38:39,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:39,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:39,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:39,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932888467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:39,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:39,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:39,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269079476] [2021-07-09 17:38:39,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:39,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:39,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:39,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:39,725 INFO L87 Difference]: Start difference. First operand 320 states and 940 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:40,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:40,116 INFO L93 Difference]: Finished difference Result 736 states and 2158 transitions. [2021-07-09 17:38:40,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:40,117 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:40,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:40,118 INFO L225 Difference]: With dead ends: 736 [2021-07-09 17:38:40,118 INFO L226 Difference]: Without dead ends: 736 [2021-07-09 17:38:40,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:40,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-07-09 17:38:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 328. [2021-07-09 17:38:40,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9602446483180427) internal successors, (968), 327 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 968 transitions. [2021-07-09 17:38:40,123 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 968 transitions. Word has length 22 [2021-07-09 17:38:40,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:40,123 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 968 transitions. [2021-07-09 17:38:40,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 968 transitions. [2021-07-09 17:38:40,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:40,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:40,124 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:40,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable997,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:40,329 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:40,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:40,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1926569934, now seen corresponding path program 85 times [2021-07-09 17:38:40,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:40,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665941893] [2021-07-09 17:38:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:40,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:40,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665941893] [2021-07-09 17:38:40,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665941893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:40,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004781181] [2021-07-09 17:38:40,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:40,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:40,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:40,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004781181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:40,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:40,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:40,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833216466] [2021-07-09 17:38:40,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:40,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:40,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:40,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:40,616 INFO L87 Difference]: Start difference. First operand 328 states and 968 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:41,121 INFO L93 Difference]: Finished difference Result 755 states and 2196 transitions. [2021-07-09 17:38:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:41,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:41,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:41,122 INFO L225 Difference]: With dead ends: 755 [2021-07-09 17:38:41,122 INFO L226 Difference]: Without dead ends: 755 [2021-07-09 17:38:41,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 456.0ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:41,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-07-09 17:38:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 340. [2021-07-09 17:38:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9970501474926254) internal successors, (1016), 339 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1016 transitions. [2021-07-09 17:38:41,128 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1016 transitions. Word has length 22 [2021-07-09 17:38:41,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:41,128 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1016 transitions. [2021-07-09 17:38:41,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:41,128 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1016 transitions. [2021-07-09 17:38:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:41,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:41,128 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:41,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-07-09 17:38:41,345 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:41,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:41,345 INFO L82 PathProgramCache]: Analyzing trace with hash -873794398, now seen corresponding path program 86 times [2021-07-09 17:38:41,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:41,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701194482] [2021-07-09 17:38:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:41,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:41,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701194482] [2021-07-09 17:38:41,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701194482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:41,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855141723] [2021-07-09 17:38:41,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:41,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:41,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:41,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:41,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:41,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855141723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:41,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:41,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:41,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995832283] [2021-07-09 17:38:41,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:41,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:41,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:41,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:41,609 INFO L87 Difference]: Start difference. First operand 340 states and 1016 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:42,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:42,012 INFO L93 Difference]: Finished difference Result 758 states and 2203 transitions. [2021-07-09 17:38:42,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:42,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:42,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:42,014 INFO L225 Difference]: With dead ends: 758 [2021-07-09 17:38:42,014 INFO L226 Difference]: Without dead ends: 748 [2021-07-09 17:38:42,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 321.9ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:42,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-07-09 17:38:42,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 347. [2021-07-09 17:38:42,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.976878612716763) internal successors, (1030), 346 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1030 transitions. [2021-07-09 17:38:42,019 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1030 transitions. Word has length 22 [2021-07-09 17:38:42,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:42,019 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1030 transitions. [2021-07-09 17:38:42,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1030 transitions. [2021-07-09 17:38:42,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:42,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:42,020 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:42,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:42,233 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:42,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:42,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1192906718, now seen corresponding path program 87 times [2021-07-09 17:38:42,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:42,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652735786] [2021-07-09 17:38:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:42,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:42,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652735786] [2021-07-09 17:38:42,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652735786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:42,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741367464] [2021-07-09 17:38:42,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:42,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:42,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:42,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:42,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:42,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741367464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:42,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:42,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:42,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065619834] [2021-07-09 17:38:42,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:42,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:42,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:42,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:42,527 INFO L87 Difference]: Start difference. First operand 347 states and 1030 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:42,888 INFO L93 Difference]: Finished difference Result 686 states and 2019 transitions. [2021-07-09 17:38:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:42,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:42,889 INFO L225 Difference]: With dead ends: 686 [2021-07-09 17:38:42,889 INFO L226 Difference]: Without dead ends: 686 [2021-07-09 17:38:42,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 327.6ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-07-09 17:38:42,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 341. [2021-07-09 17:38:42,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.976470588235294) internal successors, (1012), 340 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:42,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1012 transitions. [2021-07-09 17:38:42,894 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1012 transitions. Word has length 22 [2021-07-09 17:38:42,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:42,894 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1012 transitions. [2021-07-09 17:38:42,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1012 transitions. [2021-07-09 17:38:42,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:42,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:42,895 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:43,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1019,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:43,110 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:43,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:43,111 INFO L82 PathProgramCache]: Analyzing trace with hash -241741712, now seen corresponding path program 88 times [2021-07-09 17:38:43,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:43,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937231300] [2021-07-09 17:38:43,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:43,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:43,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937231300] [2021-07-09 17:38:43,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937231300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:43,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385078618] [2021-07-09 17:38:43,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:43,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:43,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:43,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:43,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:43,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385078618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:43,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:43,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:38:43,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69896389] [2021-07-09 17:38:43,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:38:43,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:43,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:38:43,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:38:43,357 INFO L87 Difference]: Start difference. First operand 341 states and 1012 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:43,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:43,784 INFO L93 Difference]: Finished difference Result 621 states and 1823 transitions. [2021-07-09 17:38:43,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:43,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:43,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:43,785 INFO L225 Difference]: With dead ends: 621 [2021-07-09 17:38:43,785 INFO L226 Difference]: Without dead ends: 621 [2021-07-09 17:38:43,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:43,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-07-09 17:38:43,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 324. [2021-07-09 17:38:43,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-07-09 17:38:43,790 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-07-09 17:38:43,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:43,790 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-07-09 17:38:43,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:43,790 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-07-09 17:38:43,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:43,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:43,791 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:44,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1026,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:44,005 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:44,005 INFO L82 PathProgramCache]: Analyzing trace with hash 968794932, now seen corresponding path program 89 times [2021-07-09 17:38:44,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:44,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101398938] [2021-07-09 17:38:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:44,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:44,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101398938] [2021-07-09 17:38:44,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101398938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:44,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399045634] [2021-07-09 17:38:44,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:44,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:38:44,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:44,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:44,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:44,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399045634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:44,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:44,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:44,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583048234] [2021-07-09 17:38:44,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:44,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:44,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:44,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:44,238 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:44,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:44,527 INFO L93 Difference]: Finished difference Result 633 states and 1841 transitions. [2021-07-09 17:38:44,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:44,528 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:44,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:44,529 INFO L225 Difference]: With dead ends: 633 [2021-07-09 17:38:44,529 INFO L226 Difference]: Without dead ends: 633 [2021-07-09 17:38:44,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:44,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-07-09 17:38:44,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 336. [2021-07-09 17:38:44,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.985074626865672) internal successors, (1000), 335 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1000 transitions. [2021-07-09 17:38:44,533 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1000 transitions. Word has length 22 [2021-07-09 17:38:44,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:44,534 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1000 transitions. [2021-07-09 17:38:44,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1000 transitions. [2021-07-09 17:38:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:44,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:44,534 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:44,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1031,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:44,748 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:44,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:44,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1983309410, now seen corresponding path program 90 times [2021-07-09 17:38:44,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:44,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871470401] [2021-07-09 17:38:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:44,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:44,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871470401] [2021-07-09 17:38:44,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871470401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:44,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139212304] [2021-07-09 17:38:44,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:44,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:38:44,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:44,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:44,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:45,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139212304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:45,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:45,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:45,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953347073] [2021-07-09 17:38:45,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:45,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:45,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:45,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:45,028 INFO L87 Difference]: Start difference. First operand 336 states and 1000 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:45,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:45,407 INFO L93 Difference]: Finished difference Result 603 states and 1751 transitions. [2021-07-09 17:38:45,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:45,407 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:45,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:45,408 INFO L225 Difference]: With dead ends: 603 [2021-07-09 17:38:45,408 INFO L226 Difference]: Without dead ends: 594 [2021-07-09 17:38:45,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:45,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-07-09 17:38:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 342. [2021-07-09 17:38:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2021-07-09 17:38:45,412 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2021-07-09 17:38:45,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:45,412 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2021-07-09 17:38:45,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:45,413 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2021-07-09 17:38:45,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:45,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:45,413 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:45,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1037 [2021-07-09 17:38:45,629 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:45,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:45,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1137989188, now seen corresponding path program 91 times [2021-07-09 17:38:45,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:45,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998448152] [2021-07-09 17:38:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:45,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:45,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998448152] [2021-07-09 17:38:45,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998448152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:45,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985702020] [2021-07-09 17:38:45,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:45,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:45,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:45,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985702020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:45,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:45,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:45,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898006378] [2021-07-09 17:38:45,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:45,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:45,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:45,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:45,888 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:46,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:46,243 INFO L93 Difference]: Finished difference Result 546 states and 1607 transitions. [2021-07-09 17:38:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:38:46,244 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:46,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:46,245 INFO L225 Difference]: With dead ends: 546 [2021-07-09 17:38:46,245 INFO L226 Difference]: Without dead ends: 546 [2021-07-09 17:38:46,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:46,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-07-09 17:38:46,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 324. [2021-07-09 17:38:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:46,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-07-09 17:38:46,249 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-07-09 17:38:46,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:46,249 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-07-09 17:38:46,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-07-09 17:38:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:46,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:46,249 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:46,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:46,451 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:46,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:46,451 INFO L82 PathProgramCache]: Analyzing trace with hash -2141572440, now seen corresponding path program 92 times [2021-07-09 17:38:46,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:46,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704047855] [2021-07-09 17:38:46,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:46,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:46,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704047855] [2021-07-09 17:38:46,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704047855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:46,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20091705] [2021-07-09 17:38:46,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:46,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:46,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:46,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:46,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:46,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20091705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:46,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:46,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:46,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750860406] [2021-07-09 17:38:46,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:46,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:46,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:46,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:46,755 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:47,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:47,279 INFO L93 Difference]: Finished difference Result 733 states and 2130 transitions. [2021-07-09 17:38:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:38:47,279 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:47,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:47,280 INFO L225 Difference]: With dead ends: 733 [2021-07-09 17:38:47,280 INFO L226 Difference]: Without dead ends: 733 [2021-07-09 17:38:47,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 464.0ms TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:38:47,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-07-09 17:38:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 338. [2021-07-09 17:38:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0118694362017804) internal successors, (1015), 337 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1015 transitions. [2021-07-09 17:38:47,285 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1015 transitions. Word has length 22 [2021-07-09 17:38:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:47,285 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1015 transitions. [2021-07-09 17:38:47,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1015 transitions. [2021-07-09 17:38:47,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:47,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:47,286 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:47,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1048 [2021-07-09 17:38:47,501 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:47,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:47,501 INFO L82 PathProgramCache]: Analyzing trace with hash -646969476, now seen corresponding path program 93 times [2021-07-09 17:38:47,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:47,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053609707] [2021-07-09 17:38:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:47,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:47,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:47,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053609707] [2021-07-09 17:38:47,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053609707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:47,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773867769] [2021-07-09 17:38:47,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:47,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:47,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:47,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:47,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:47,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773867769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:47,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:47,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:47,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49474148] [2021-07-09 17:38:47,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:47,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:47,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:47,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:47,811 INFO L87 Difference]: Start difference. First operand 338 states and 1015 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:48,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:48,201 INFO L93 Difference]: Finished difference Result 767 states and 2208 transitions. [2021-07-09 17:38:48,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:48,202 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:48,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:48,203 INFO L225 Difference]: With dead ends: 767 [2021-07-09 17:38:48,203 INFO L226 Difference]: Without dead ends: 757 [2021-07-09 17:38:48,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 370.0ms TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:38:48,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-07-09 17:38:48,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 345. [2021-07-09 17:38:48,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.991279069767442) internal successors, (1029), 344 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1029 transitions. [2021-07-09 17:38:48,208 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1029 transitions. Word has length 22 [2021-07-09 17:38:48,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:48,208 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1029 transitions. [2021-07-09 17:38:48,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:48,208 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1029 transitions. [2021-07-09 17:38:48,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:48,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:48,208 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:48,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:48,425 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:48,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:48,425 INFO L82 PathProgramCache]: Analyzing trace with hash 803562480, now seen corresponding path program 94 times [2021-07-09 17:38:48,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:48,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173526205] [2021-07-09 17:38:48,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:48,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:48,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173526205] [2021-07-09 17:38:48,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173526205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:48,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106082331] [2021-07-09 17:38:48,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:48,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:48,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:48,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:48,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:48,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106082331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:48,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:48,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:48,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682399706] [2021-07-09 17:38:48,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:48,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:48,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:48,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:48,711 INFO L87 Difference]: Start difference. First operand 345 states and 1029 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:49,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:49,034 INFO L93 Difference]: Finished difference Result 745 states and 2169 transitions. [2021-07-09 17:38:49,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:49,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:49,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:49,035 INFO L225 Difference]: With dead ends: 745 [2021-07-09 17:38:49,035 INFO L226 Difference]: Without dead ends: 745 [2021-07-09 17:38:49,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 286.7ms TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:49,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-07-09 17:38:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 351. [2021-07-09 17:38:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0171428571428573) internal successors, (1056), 350 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1056 transitions. [2021-07-09 17:38:49,041 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1056 transitions. Word has length 22 [2021-07-09 17:38:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:49,041 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1056 transitions. [2021-07-09 17:38:49,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1056 transitions. [2021-07-09 17:38:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:49,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:49,041 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:49,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:49,257 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:49,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:49,258 INFO L82 PathProgramCache]: Analyzing trace with hash -708456964, now seen corresponding path program 95 times [2021-07-09 17:38:49,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:49,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696368352] [2021-07-09 17:38:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:49,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:49,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696368352] [2021-07-09 17:38:49,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696368352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:49,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821147611] [2021-07-09 17:38:49,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:49,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:38:49,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:49,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:49,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:49,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821147611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:49,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:49,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:49,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603067187] [2021-07-09 17:38:49,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:49,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:49,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:49,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:49,586 INFO L87 Difference]: Start difference. First operand 351 states and 1056 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:50,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:50,028 INFO L93 Difference]: Finished difference Result 754 states and 2175 transitions. [2021-07-09 17:38:50,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:50,028 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:50,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:50,029 INFO L225 Difference]: With dead ends: 754 [2021-07-09 17:38:50,029 INFO L226 Difference]: Without dead ends: 745 [2021-07-09 17:38:50,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:38:50,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-07-09 17:38:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 357. [2021-07-09 17:38:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.0) internal successors, (1068), 356 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1068 transitions. [2021-07-09 17:38:50,035 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1068 transitions. Word has length 22 [2021-07-09 17:38:50,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:50,035 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1068 transitions. [2021-07-09 17:38:50,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1068 transitions. [2021-07-09 17:38:50,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:50,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:50,035 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:50,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-07-09 17:38:50,251 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:50,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:50,251 INFO L82 PathProgramCache]: Analyzing trace with hash -931017330, now seen corresponding path program 96 times [2021-07-09 17:38:50,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:50,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122650128] [2021-07-09 17:38:50,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:50,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:50,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122650128] [2021-07-09 17:38:50,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122650128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:50,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984460757] [2021-07-09 17:38:50,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:50,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:38:50,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:50,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:50,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:50,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984460757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:50,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:50,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:50,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344649861] [2021-07-09 17:38:50,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:50,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:50,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:50,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:50,492 INFO L87 Difference]: Start difference. First operand 357 states and 1068 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:50,966 INFO L93 Difference]: Finished difference Result 797 states and 2257 transitions. [2021-07-09 17:38:50,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:50,966 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:50,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:50,967 INFO L225 Difference]: With dead ends: 797 [2021-07-09 17:38:50,967 INFO L226 Difference]: Without dead ends: 787 [2021-07-09 17:38:50,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 393.6ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:38:50,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-07-09 17:38:50,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 369. [2021-07-09 17:38:50,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.005434782608696) internal successors, (1106), 368 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1106 transitions. [2021-07-09 17:38:50,973 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1106 transitions. Word has length 22 [2021-07-09 17:38:50,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:50,973 INFO L482 AbstractCegarLoop]: Abstraction has 369 states and 1106 transitions. [2021-07-09 17:38:50,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:50,973 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1106 transitions. [2021-07-09 17:38:50,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:50,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:50,975 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:51,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1103 [2021-07-09 17:38:51,191 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:51,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:51,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1113107642, now seen corresponding path program 97 times [2021-07-09 17:38:51,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:51,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044190664] [2021-07-09 17:38:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:51,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:51,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044190664] [2021-07-09 17:38:51,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044190664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:51,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920204595] [2021-07-09 17:38:51,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:51,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:51,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:51,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920204595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:51,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:51,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:38:51,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056756242] [2021-07-09 17:38:51,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:38:51,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:51,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:38:51,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:38:51,448 INFO L87 Difference]: Start difference. First operand 369 states and 1106 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:51,779 INFO L93 Difference]: Finished difference Result 711 states and 2049 transitions. [2021-07-09 17:38:51,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:51,780 INFO L225 Difference]: With dead ends: 711 [2021-07-09 17:38:51,780 INFO L226 Difference]: Without dead ends: 699 [2021-07-09 17:38:51,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:38:51,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-07-09 17:38:51,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 365. [2021-07-09 17:38:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0054945054945055) internal successors, (1094), 364 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1094 transitions. [2021-07-09 17:38:51,786 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1094 transitions. Word has length 22 [2021-07-09 17:38:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:51,786 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 1094 transitions. [2021-07-09 17:38:51,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:51,786 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1094 transitions. [2021-07-09 17:38:51,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:51,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:51,786 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:52,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1114,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:52,002 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:52,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1304772384, now seen corresponding path program 98 times [2021-07-09 17:38:52,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:52,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216742750] [2021-07-09 17:38:52,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:52,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:52,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216742750] [2021-07-09 17:38:52,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216742750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:52,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267890742] [2021-07-09 17:38:52,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:52,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:52,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:52,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:52,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:52,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267890742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:52,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:52,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:52,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066474138] [2021-07-09 17:38:52,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:52,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:52,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:52,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:52,271 INFO L87 Difference]: Start difference. First operand 365 states and 1094 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:52,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:52,758 INFO L93 Difference]: Finished difference Result 689 states and 2001 transitions. [2021-07-09 17:38:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:52,758 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:52,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:52,759 INFO L225 Difference]: With dead ends: 689 [2021-07-09 17:38:52,759 INFO L226 Difference]: Without dead ends: 689 [2021-07-09 17:38:52,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 417.9ms TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:38:52,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-07-09 17:38:52,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 370. [2021-07-09 17:38:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.0) internal successors, (1107), 369 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1107 transitions. [2021-07-09 17:38:52,776 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1107 transitions. Word has length 22 [2021-07-09 17:38:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:52,776 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1107 transitions. [2021-07-09 17:38:52,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1107 transitions. [2021-07-09 17:38:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:52,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:52,777 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:52,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-07-09 17:38:52,993 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:52,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:52,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1495591948, now seen corresponding path program 99 times [2021-07-09 17:38:52,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:52,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299115951] [2021-07-09 17:38:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:53,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:53,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299115951] [2021-07-09 17:38:53,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299115951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:53,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920860315] [2021-07-09 17:38:53,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:53,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:53,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:53,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:53,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:53,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920860315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:53,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:53,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:53,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695862272] [2021-07-09 17:38:53,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:53,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:53,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:53,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:53,256 INFO L87 Difference]: Start difference. First operand 370 states and 1107 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:53,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:53,573 INFO L93 Difference]: Finished difference Result 680 states and 1981 transitions. [2021-07-09 17:38:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:53,573 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:53,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:53,574 INFO L225 Difference]: With dead ends: 680 [2021-07-09 17:38:53,574 INFO L226 Difference]: Without dead ends: 670 [2021-07-09 17:38:53,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:53,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-07-09 17:38:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 349. [2021-07-09 17:38:53,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.971264367816092) internal successors, (1034), 348 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1034 transitions. [2021-07-09 17:38:53,579 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1034 transitions. Word has length 22 [2021-07-09 17:38:53,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:53,579 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1034 transitions. [2021-07-09 17:38:53,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1034 transitions. [2021-07-09 17:38:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:53,580 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:53,580 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:53,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:53,796 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:53,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:53,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2041925648, now seen corresponding path program 100 times [2021-07-09 17:38:53,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:53,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129375012] [2021-07-09 17:38:53,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:53,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:53,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129375012] [2021-07-09 17:38:53,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129375012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:53,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102801786] [2021-07-09 17:38:53,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:53,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:53,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:53,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:53,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:54,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102801786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:54,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:54,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:54,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158930361] [2021-07-09 17:38:54,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:54,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:54,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:54,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:54,057 INFO L87 Difference]: Start difference. First operand 349 states and 1034 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:54,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:54,378 INFO L93 Difference]: Finished difference Result 594 states and 1754 transitions. [2021-07-09 17:38:54,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:54,378 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:54,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:54,388 INFO L225 Difference]: With dead ends: 594 [2021-07-09 17:38:54,388 INFO L226 Difference]: Without dead ends: 594 [2021-07-09 17:38:54,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 301.6ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:54,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-07-09 17:38:54,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 346. [2021-07-09 17:38:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.971014492753623) internal successors, (1025), 345 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1025 transitions. [2021-07-09 17:38:54,393 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1025 transitions. Word has length 22 [2021-07-09 17:38:54,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:54,393 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1025 transitions. [2021-07-09 17:38:54,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:54,393 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1025 transitions. [2021-07-09 17:38:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:54,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:54,394 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:54,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:54,610 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:54,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:54,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1317993700, now seen corresponding path program 101 times [2021-07-09 17:38:54,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:54,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957557774] [2021-07-09 17:38:54,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:54,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:54,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957557774] [2021-07-09 17:38:54,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957557774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:54,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146298266] [2021-07-09 17:38:54,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:54,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:38:54,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:54,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:54,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:54,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146298266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:54,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:54,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:54,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542071455] [2021-07-09 17:38:54,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:54,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:54,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:54,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:54,864 INFO L87 Difference]: Start difference. First operand 346 states and 1025 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:55,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:55,342 INFO L93 Difference]: Finished difference Result 655 states and 1884 transitions. [2021-07-09 17:38:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:38:55,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:55,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:55,343 INFO L225 Difference]: With dead ends: 655 [2021-07-09 17:38:55,343 INFO L226 Difference]: Without dead ends: 655 [2021-07-09 17:38:55,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 413.7ms TimeCoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:38:55,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-07-09 17:38:55,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 354. [2021-07-09 17:38:55,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.9830028328611897) internal successors, (1053), 353 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1053 transitions. [2021-07-09 17:38:55,348 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1053 transitions. Word has length 22 [2021-07-09 17:38:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:55,348 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1053 transitions. [2021-07-09 17:38:55,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:55,348 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1053 transitions. [2021-07-09 17:38:55,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:55,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:55,349 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:55,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1148,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:55,565 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:55,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:55,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1464954152, now seen corresponding path program 102 times [2021-07-09 17:38:55,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:55,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657789322] [2021-07-09 17:38:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:55,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:55,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657789322] [2021-07-09 17:38:55,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657789322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:55,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342407398] [2021-07-09 17:38:55,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:55,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:38:55,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:55,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:55,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:55,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342407398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:55,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:55,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:55,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318606318] [2021-07-09 17:38:55,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:55,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:55,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:55,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:55,811 INFO L87 Difference]: Start difference. First operand 354 states and 1053 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:56,161 INFO L93 Difference]: Finished difference Result 622 states and 1795 transitions. [2021-07-09 17:38:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:56,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:56,162 INFO L225 Difference]: With dead ends: 622 [2021-07-09 17:38:56,162 INFO L226 Difference]: Without dead ends: 613 [2021-07-09 17:38:56,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:56,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-07-09 17:38:56,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 354. [2021-07-09 17:38:56,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.954674220963173) internal successors, (1043), 353 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1043 transitions. [2021-07-09 17:38:56,167 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1043 transitions. Word has length 22 [2021-07-09 17:38:56,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:56,167 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1043 transitions. [2021-07-09 17:38:56,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1043 transitions. [2021-07-09 17:38:56,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:56,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:56,167 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:56,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1155 [2021-07-09 17:38:56,384 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:56,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:56,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1287030692, now seen corresponding path program 103 times [2021-07-09 17:38:56,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:56,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447115741] [2021-07-09 17:38:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:56,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:56,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447115741] [2021-07-09 17:38:56,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447115741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:56,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876943193] [2021-07-09 17:38:56,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:56,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:56,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:56,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876943193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:56,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:56,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:56,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750530258] [2021-07-09 17:38:56,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:56,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:56,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:56,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:56,637 INFO L87 Difference]: Start difference. First operand 354 states and 1043 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:56,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:56,961 INFO L93 Difference]: Finished difference Result 565 states and 1664 transitions. [2021-07-09 17:38:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:38:56,961 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:56,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:56,962 INFO L225 Difference]: With dead ends: 565 [2021-07-09 17:38:56,962 INFO L226 Difference]: Without dead ends: 565 [2021-07-09 17:38:56,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 301.2ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:38:56,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-07-09 17:38:56,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 324. [2021-07-09 17:38:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:56,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-07-09 17:38:56,966 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-07-09 17:38:56,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:56,966 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-07-09 17:38:56,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:56,966 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-07-09 17:38:56,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:56,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:56,967 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:57,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:57,183 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:57,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:57,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1437395562, now seen corresponding path program 104 times [2021-07-09 17:38:57,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:57,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279694985] [2021-07-09 17:38:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:57,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:57,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279694985] [2021-07-09 17:38:57,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279694985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:57,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611901732] [2021-07-09 17:38:57,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:57,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:57,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:57,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:57,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:57,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611901732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:57,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:57,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:57,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173353863] [2021-07-09 17:38:57,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:57,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:57,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:57,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:57,441 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:57,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:57,742 INFO L93 Difference]: Finished difference Result 489 states and 1425 transitions. [2021-07-09 17:38:57,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:38:57,743 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:57,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:57,744 INFO L225 Difference]: With dead ends: 489 [2021-07-09 17:38:57,744 INFO L226 Difference]: Without dead ends: 489 [2021-07-09 17:38:57,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:38:57,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-09 17:38:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 334. [2021-07-09 17:38:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.978978978978979) internal successors, (992), 333 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 992 transitions. [2021-07-09 17:38:57,748 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 992 transitions. Word has length 22 [2021-07-09 17:38:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:57,748 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 992 transitions. [2021-07-09 17:38:57,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:57,748 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 992 transitions. [2021-07-09 17:38:57,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:57,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:57,748 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:57,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1170,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:57,964 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:57,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:57,964 INFO L82 PathProgramCache]: Analyzing trace with hash 57207402, now seen corresponding path program 105 times [2021-07-09 17:38:57,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:57,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745121702] [2021-07-09 17:38:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:58,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:58,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745121702] [2021-07-09 17:38:58,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745121702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:58,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764018334] [2021-07-09 17:38:58,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:58,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:38:58,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:58,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:58,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:58,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764018334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:58,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:58,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:58,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17021666] [2021-07-09 17:38:58,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:58,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:58,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:58,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:58,224 INFO L87 Difference]: Start difference. First operand 334 states and 992 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:58,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:58,588 INFO L93 Difference]: Finished difference Result 516 states and 1492 transitions. [2021-07-09 17:38:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:38:58,589 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:58,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:58,589 INFO L225 Difference]: With dead ends: 516 [2021-07-09 17:38:58,589 INFO L226 Difference]: Without dead ends: 506 [2021-07-09 17:38:58,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:38:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-07-09 17:38:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 331. [2021-07-09 17:38:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9696969696969697) internal successors, (980), 330 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 980 transitions. [2021-07-09 17:38:58,594 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 980 transitions. Word has length 22 [2021-07-09 17:38:58,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:58,594 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 980 transitions. [2021-07-09 17:38:58,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:58,594 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 980 transitions. [2021-07-09 17:38:58,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:58,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:58,594 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:58,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1180,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:58,810 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:58,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:58,811 INFO L82 PathProgramCache]: Analyzing trace with hash 482154612, now seen corresponding path program 106 times [2021-07-09 17:38:58,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:58,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375575025] [2021-07-09 17:38:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:58,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:58,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375575025] [2021-07-09 17:38:58,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375575025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:58,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696696734] [2021-07-09 17:38:58,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:58,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:38:58,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:58,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:58,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:59,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696696734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:59,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:59,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:59,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354865918] [2021-07-09 17:38:59,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:59,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:59,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:59,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:59,113 INFO L87 Difference]: Start difference. First operand 331 states and 980 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:38:59,468 INFO L93 Difference]: Finished difference Result 477 states and 1390 transitions. [2021-07-09 17:38:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:38:59,469 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:38:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:38:59,469 INFO L225 Difference]: With dead ends: 477 [2021-07-09 17:38:59,469 INFO L226 Difference]: Without dead ends: 457 [2021-07-09 17:38:59,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:38:59,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-09 17:38:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 328. [2021-07-09 17:38:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9602446483180427) internal successors, (968), 327 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 968 transitions. [2021-07-09 17:38:59,473 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 968 transitions. Word has length 22 [2021-07-09 17:38:59,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:38:59,473 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 968 transitions. [2021-07-09 17:38:59,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:38:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 968 transitions. [2021-07-09 17:38:59,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:38:59,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:38:59,474 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:38:59,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1193,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:59,690 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:38:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:38:59,691 INFO L82 PathProgramCache]: Analyzing trace with hash -332526258, now seen corresponding path program 107 times [2021-07-09 17:38:59,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:38:59,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345091835] [2021-07-09 17:38:59,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:38:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:38:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:59,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:38:59,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345091835] [2021-07-09 17:38:59,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345091835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:59,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509602353] [2021-07-09 17:38:59,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:38:59,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:38:59,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:38:59,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:38:59,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:38:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:38:59,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509602353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:38:59,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:38:59,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:38:59,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611566388] [2021-07-09 17:38:59,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:38:59,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:38:59,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:38:59,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:38:59,947 INFO L87 Difference]: Start difference. First operand 328 states and 968 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:00,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:00,299 INFO L93 Difference]: Finished difference Result 607 states and 1761 transitions. [2021-07-09 17:39:00,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:39:00,300 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:00,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:00,301 INFO L225 Difference]: With dead ends: 607 [2021-07-09 17:39:00,301 INFO L226 Difference]: Without dead ends: 607 [2021-07-09 17:39:00,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:00,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-07-09 17:39:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 338. [2021-07-09 17:39:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0118694362017804) internal successors, (1015), 337 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:00,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1015 transitions. [2021-07-09 17:39:00,305 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1015 transitions. Word has length 22 [2021-07-09 17:39:00,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:00,305 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1015 transitions. [2021-07-09 17:39:00,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:00,305 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1015 transitions. [2021-07-09 17:39:00,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:00,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:00,306 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:00,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1201,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:00,522 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:00,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:00,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1162076706, now seen corresponding path program 108 times [2021-07-09 17:39:00,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:00,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124796766] [2021-07-09 17:39:00,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:00,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:00,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124796766] [2021-07-09 17:39:00,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124796766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:00,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329131500] [2021-07-09 17:39:00,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:00,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:39:00,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:00,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:00,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:00,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329131500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:00,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:00,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:00,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670804463] [2021-07-09 17:39:00,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:00,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:00,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:00,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:00,797 INFO L87 Difference]: Start difference. First operand 338 states and 1015 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:01,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:01,234 INFO L93 Difference]: Finished difference Result 651 states and 1869 transitions. [2021-07-09 17:39:01,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:39:01,235 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:01,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:01,236 INFO L225 Difference]: With dead ends: 651 [2021-07-09 17:39:01,236 INFO L226 Difference]: Without dead ends: 641 [2021-07-09 17:39:01,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 400.4ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:01,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-07-09 17:39:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 345. [2021-07-09 17:39:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.991279069767442) internal successors, (1029), 344 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:01,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1029 transitions. [2021-07-09 17:39:01,241 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1029 transitions. Word has length 22 [2021-07-09 17:39:01,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:01,241 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1029 transitions. [2021-07-09 17:39:01,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:01,241 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1029 transitions. [2021-07-09 17:39:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:01,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:01,241 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:01,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-07-09 17:39:01,458 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:01,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:01,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1682358634, now seen corresponding path program 109 times [2021-07-09 17:39:01,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:01,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381600892] [2021-07-09 17:39:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:01,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:01,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381600892] [2021-07-09 17:39:01,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381600892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:01,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951393560] [2021-07-09 17:39:01,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:01,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:01,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:01,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951393560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:01,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:01,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:01,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199457384] [2021-07-09 17:39:01,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:01,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:01,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:01,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:01,736 INFO L87 Difference]: Start difference. First operand 345 states and 1029 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:01,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:01,988 INFO L93 Difference]: Finished difference Result 540 states and 1570 transitions. [2021-07-09 17:39:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:01,988 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:01,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:01,989 INFO L225 Difference]: With dead ends: 540 [2021-07-09 17:39:01,989 INFO L226 Difference]: Without dead ends: 540 [2021-07-09 17:39:01,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:39:01,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-07-09 17:39:01,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 336. [2021-07-09 17:39:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.997014925373134) internal successors, (1004), 335 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:01,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1004 transitions. [2021-07-09 17:39:01,994 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1004 transitions. Word has length 22 [2021-07-09 17:39:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:01,994 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1004 transitions. [2021-07-09 17:39:01,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:01,994 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1004 transitions. [2021-07-09 17:39:01,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:01,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:01,994 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:02,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1221 [2021-07-09 17:39:02,211 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:02,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:02,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1100589218, now seen corresponding path program 110 times [2021-07-09 17:39:02,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:02,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362818126] [2021-07-09 17:39:02,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:02,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:02,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362818126] [2021-07-09 17:39:02,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362818126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:02,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799750451] [2021-07-09 17:39:02,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:02,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:02,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:02,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:02,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:02,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799750451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:02,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:02,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:02,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360201327] [2021-07-09 17:39:02,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:02,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:02,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:02,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:02,488 INFO L87 Difference]: Start difference. First operand 336 states and 1004 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:02,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:02,744 INFO L93 Difference]: Finished difference Result 556 states and 1597 transitions. [2021-07-09 17:39:02,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:02,744 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:02,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:02,745 INFO L225 Difference]: With dead ends: 556 [2021-07-09 17:39:02,745 INFO L226 Difference]: Without dead ends: 547 [2021-07-09 17:39:02,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:39:02,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-07-09 17:39:02,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 342. [2021-07-09 17:39:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9794721407624634) internal successors, (1016), 341 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1016 transitions. [2021-07-09 17:39:02,749 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1016 transitions. Word has length 22 [2021-07-09 17:39:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:02,749 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1016 transitions. [2021-07-09 17:39:02,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1016 transitions. [2021-07-09 17:39:02,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:02,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:02,750 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:02,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1234 [2021-07-09 17:39:02,952 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:02,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:02,952 INFO L82 PathProgramCache]: Analyzing trace with hash 878028852, now seen corresponding path program 111 times [2021-07-09 17:39:02,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:02,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725099586] [2021-07-09 17:39:02,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:03,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:03,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725099586] [2021-07-09 17:39:03,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725099586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:03,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637744999] [2021-07-09 17:39:03,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:03,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:03,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:03,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:03,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:03,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637744999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:03,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:03,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:03,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259099598] [2021-07-09 17:39:03,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:03,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:03,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:03,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:03,217 INFO L87 Difference]: Start difference. First operand 342 states and 1016 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:03,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:03,670 INFO L93 Difference]: Finished difference Result 616 states and 1742 transitions. [2021-07-09 17:39:03,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:39:03,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:03,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:03,672 INFO L225 Difference]: With dead ends: 616 [2021-07-09 17:39:03,672 INFO L226 Difference]: Without dead ends: 606 [2021-07-09 17:39:03,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 364.7ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-07-09 17:39:03,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 364. [2021-07-09 17:39:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.975206611570248) internal successors, (1080), 363 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1080 transitions. [2021-07-09 17:39:03,681 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1080 transitions. Word has length 22 [2021-07-09 17:39:03,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:03,681 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 1080 transitions. [2021-07-09 17:39:03,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:03,681 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1080 transitions. [2021-07-09 17:39:03,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:03,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:03,682 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:03,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1246 [2021-07-09 17:39:03,898 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:03,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:03,899 INFO L82 PathProgramCache]: Analyzing trace with hash 695938540, now seen corresponding path program 112 times [2021-07-09 17:39:03,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:03,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241163010] [2021-07-09 17:39:03,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:03,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:03,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241163010] [2021-07-09 17:39:03,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241163010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:03,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778648143] [2021-07-09 17:39:03,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:04,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:04,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:04,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:04,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:04,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778648143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:04,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:04,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:04,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378952738] [2021-07-09 17:39:04,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:04,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:04,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:04,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:04,157 INFO L87 Difference]: Start difference. First operand 364 states and 1080 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:04,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:04,499 INFO L93 Difference]: Finished difference Result 606 states and 1703 transitions. [2021-07-09 17:39:04,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:39:04,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:04,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:04,500 INFO L225 Difference]: With dead ends: 606 [2021-07-09 17:39:04,500 INFO L226 Difference]: Without dead ends: 594 [2021-07-09 17:39:04,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 332.9ms TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:04,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-07-09 17:39:04,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 344. [2021-07-09 17:39:04,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.9737609329446064) internal successors, (1020), 343 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1020 transitions. [2021-07-09 17:39:04,505 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1020 transitions. Word has length 22 [2021-07-09 17:39:04,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:04,506 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1020 transitions. [2021-07-09 17:39:04,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:04,506 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1020 transitions. [2021-07-09 17:39:04,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:04,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:04,506 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:04,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-07-09 17:39:04,722 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:04,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:04,723 INFO L82 PathProgramCache]: Analyzing trace with hash 266605730, now seen corresponding path program 113 times [2021-07-09 17:39:04,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:04,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596259809] [2021-07-09 17:39:04,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:04,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:04,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596259809] [2021-07-09 17:39:04,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596259809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:04,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003429498] [2021-07-09 17:39:04,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:04,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:04,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:04,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:04,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:04,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003429498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:04,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:04,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:04,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157430179] [2021-07-09 17:39:04,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:04,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:04,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:04,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:04,994 INFO L87 Difference]: Start difference. First operand 344 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:05,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:05,366 INFO L93 Difference]: Finished difference Result 474 states and 1386 transitions. [2021-07-09 17:39:05,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:05,366 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:05,367 INFO L225 Difference]: With dead ends: 474 [2021-07-09 17:39:05,367 INFO L226 Difference]: Without dead ends: 454 [2021-07-09 17:39:05,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:05,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-09 17:39:05,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 350. [2021-07-09 17:39:05,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.9598853868194843) internal successors, (1033), 349 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1033 transitions. [2021-07-09 17:39:05,371 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1033 transitions. Word has length 22 [2021-07-09 17:39:05,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:05,371 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1033 transitions. [2021-07-09 17:39:05,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:05,371 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1033 transitions. [2021-07-09 17:39:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:05,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:05,372 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:05,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:05,577 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:05,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:05,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1083226646, now seen corresponding path program 114 times [2021-07-09 17:39:05,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:05,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843571892] [2021-07-09 17:39:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:05,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:05,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843571892] [2021-07-09 17:39:05,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843571892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:05,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181755778] [2021-07-09 17:39:05,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:05,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:05,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:05,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:05,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:05,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181755778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:05,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:05,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:05,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007616853] [2021-07-09 17:39:05,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:05,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:05,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:05,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:05,877 INFO L87 Difference]: Start difference. First operand 350 states and 1033 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:06,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:06,240 INFO L93 Difference]: Finished difference Result 552 states and 1564 transitions. [2021-07-09 17:39:06,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:39:06,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:06,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:06,242 INFO L225 Difference]: With dead ends: 552 [2021-07-09 17:39:06,242 INFO L226 Difference]: Without dead ends: 542 [2021-07-09 17:39:06,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 326.8ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:06,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-07-09 17:39:06,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 372. [2021-07-09 17:39:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.9568733153638815) internal successors, (1097), 371 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:06,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1097 transitions. [2021-07-09 17:39:06,246 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1097 transitions. Word has length 22 [2021-07-09 17:39:06,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:06,246 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1097 transitions. [2021-07-09 17:39:06,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:06,246 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1097 transitions. [2021-07-09 17:39:06,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:06,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:06,247 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:06,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1280 [2021-07-09 17:39:06,463 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:06,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:06,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1265316958, now seen corresponding path program 115 times [2021-07-09 17:39:06,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:06,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371836941] [2021-07-09 17:39:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:06,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:06,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371836941] [2021-07-09 17:39:06,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371836941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:06,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203854197] [2021-07-09 17:39:06,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:06,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:06,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:06,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203854197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:06,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:06,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:06,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533654593] [2021-07-09 17:39:06,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:06,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:06,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:06,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:06,713 INFO L87 Difference]: Start difference. First operand 372 states and 1097 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:07,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:07,033 INFO L93 Difference]: Finished difference Result 509 states and 1453 transitions. [2021-07-09 17:39:07,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:07,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:07,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:07,034 INFO L225 Difference]: With dead ends: 509 [2021-07-09 17:39:07,034 INFO L226 Difference]: Without dead ends: 494 [2021-07-09 17:39:07,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 255.3ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:39:07,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-07-09 17:39:07,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 346. [2021-07-09 17:39:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.9681159420289855) internal successors, (1024), 345 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:07,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1024 transitions. [2021-07-09 17:39:07,039 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1024 transitions. Word has length 22 [2021-07-09 17:39:07,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:07,039 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1024 transitions. [2021-07-09 17:39:07,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:07,039 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1024 transitions. [2021-07-09 17:39:07,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:07,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:07,039 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:07,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:07,255 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:07,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:07,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1974888418, now seen corresponding path program 116 times [2021-07-09 17:39:07,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:07,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925209444] [2021-07-09 17:39:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:07,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:07,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925209444] [2021-07-09 17:39:07,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925209444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:07,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581050554] [2021-07-09 17:39:07,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:07,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:07,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:07,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:07,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581050554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:07,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:07,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:07,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360418765] [2021-07-09 17:39:07,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:07,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:07,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:07,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:07,505 INFO L87 Difference]: Start difference. First operand 346 states and 1024 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:07,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:07,731 INFO L93 Difference]: Finished difference Result 472 states and 1360 transitions. [2021-07-09 17:39:07,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:07,731 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:07,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:07,732 INFO L225 Difference]: With dead ends: 472 [2021-07-09 17:39:07,732 INFO L226 Difference]: Without dead ends: 472 [2021-07-09 17:39:07,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:39:07,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-09 17:39:07,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 349. [2021-07-09 17:39:07,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.954022988505747) internal successors, (1028), 348 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:07,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1028 transitions. [2021-07-09 17:39:07,736 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1028 transitions. Word has length 22 [2021-07-09 17:39:07,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:07,736 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1028 transitions. [2021-07-09 17:39:07,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:07,736 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1028 transitions. [2021-07-09 17:39:07,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:07,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:07,737 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:07,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1301 [2021-07-09 17:39:07,952 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:07,952 INFO L82 PathProgramCache]: Analyzing trace with hash -480285454, now seen corresponding path program 117 times [2021-07-09 17:39:07,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:07,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336653235] [2021-07-09 17:39:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:08,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:08,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336653235] [2021-07-09 17:39:08,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336653235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:08,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196641155] [2021-07-09 17:39:08,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:08,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:39:08,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:08,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:08,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:08,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196641155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:08,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:08,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:08,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812112405] [2021-07-09 17:39:08,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:08,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:08,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:08,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:08,194 INFO L87 Difference]: Start difference. First operand 349 states and 1028 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:08,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:08,425 INFO L93 Difference]: Finished difference Result 499 states and 1424 transitions. [2021-07-09 17:39:08,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:08,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:08,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:08,426 INFO L225 Difference]: With dead ends: 499 [2021-07-09 17:39:08,426 INFO L226 Difference]: Without dead ends: 489 [2021-07-09 17:39:08,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:39:08,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-09 17:39:08,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 346. [2021-07-09 17:39:08,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:08,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1016 transitions. [2021-07-09 17:39:08,430 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1016 transitions. Word has length 22 [2021-07-09 17:39:08,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:08,430 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1016 transitions. [2021-07-09 17:39:08,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1016 transitions. [2021-07-09 17:39:08,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:08,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:08,431 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:08,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1306 [2021-07-09 17:39:08,647 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:08,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:08,647 INFO L82 PathProgramCache]: Analyzing trace with hash -55338244, now seen corresponding path program 118 times [2021-07-09 17:39:08,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:08,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559414117] [2021-07-09 17:39:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:08,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:08,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559414117] [2021-07-09 17:39:08,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559414117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:08,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847426494] [2021-07-09 17:39:08,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:08,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:08,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:08,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:08,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:08,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847426494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:08,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:08,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:08,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844681282] [2021-07-09 17:39:08,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:08,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:08,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:08,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:08,907 INFO L87 Difference]: Start difference. First operand 346 states and 1016 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:09,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:09,179 INFO L93 Difference]: Finished difference Result 450 states and 1308 transitions. [2021-07-09 17:39:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:09,179 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:09,180 INFO L225 Difference]: With dead ends: 450 [2021-07-09 17:39:09,180 INFO L226 Difference]: Without dead ends: 430 [2021-07-09 17:39:09,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:39:09,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-07-09 17:39:09,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 328. [2021-07-09 17:39:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.948012232415902) internal successors, (964), 327 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 964 transitions. [2021-07-09 17:39:09,199 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 964 transitions. Word has length 22 [2021-07-09 17:39:09,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:09,199 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 964 transitions. [2021-07-09 17:39:09,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 964 transitions. [2021-07-09 17:39:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:09,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:09,199 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:09,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1312 [2021-07-09 17:39:09,415 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:09,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1651654990, now seen corresponding path program 119 times [2021-07-09 17:39:09,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:09,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355280678] [2021-07-09 17:39:09,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:09,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:09,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355280678] [2021-07-09 17:39:09,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355280678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:09,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046466868] [2021-07-09 17:39:09,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:09,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:09,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:09,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:09,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:09,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046466868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:09,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:09,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:09,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546910606] [2021-07-09 17:39:09,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:09,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:09,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:09,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:09,733 INFO L87 Difference]: Start difference. First operand 328 states and 964 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:10,074 INFO L93 Difference]: Finished difference Result 531 states and 1544 transitions. [2021-07-09 17:39:10,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:39:10,074 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:10,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:10,075 INFO L225 Difference]: With dead ends: 531 [2021-07-09 17:39:10,075 INFO L226 Difference]: Without dead ends: 531 [2021-07-09 17:39:10,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 287.4ms TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:10,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-07-09 17:39:10,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 340. [2021-07-09 17:39:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9852507374631267) internal successors, (1012), 339 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1012 transitions. [2021-07-09 17:39:10,079 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1012 transitions. Word has length 22 [2021-07-09 17:39:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:10,080 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1012 transitions. [2021-07-09 17:39:10,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:10,080 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1012 transitions. [2021-07-09 17:39:10,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:10,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:10,080 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:10,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1316,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:10,296 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:10,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:10,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1148709342, now seen corresponding path program 120 times [2021-07-09 17:39:10,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:10,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294837805] [2021-07-09 17:39:10,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:10,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:10,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294837805] [2021-07-09 17:39:10,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294837805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:10,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620031477] [2021-07-09 17:39:10,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:10,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:10,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:10,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:10,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:10,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620031477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:10,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:10,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:10,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609131411] [2021-07-09 17:39:10,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:10,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:10,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:10,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:10,532 INFO L87 Difference]: Start difference. First operand 340 states and 1012 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:10,854 INFO L93 Difference]: Finished difference Result 503 states and 1458 transitions. [2021-07-09 17:39:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:39:10,854 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:10,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:10,855 INFO L225 Difference]: With dead ends: 503 [2021-07-09 17:39:10,855 INFO L226 Difference]: Without dead ends: 493 [2021-07-09 17:39:10,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:39:10,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-07-09 17:39:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 347. [2021-07-09 17:39:10,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.9653179190751446) internal successors, (1026), 346 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1026 transitions. [2021-07-09 17:39:10,859 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1026 transitions. Word has length 22 [2021-07-09 17:39:10,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:10,859 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1026 transitions. [2021-07-09 17:39:10,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:10,859 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1026 transitions. [2021-07-09 17:39:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:10,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:10,860 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:11,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1322 [2021-07-09 17:39:11,069 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:11,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1467821662, now seen corresponding path program 121 times [2021-07-09 17:39:11,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:11,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480984029] [2021-07-09 17:39:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:11,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:11,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480984029] [2021-07-09 17:39:11,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480984029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:11,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510619896] [2021-07-09 17:39:11,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:11,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:11,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:11,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510619896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:11,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:11,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:11,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35638549] [2021-07-09 17:39:11,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:11,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:11,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:11,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:11,324 INFO L87 Difference]: Start difference. First operand 347 states and 1026 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:11,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:11,536 INFO L93 Difference]: Finished difference Result 431 states and 1272 transitions. [2021-07-09 17:39:11,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:11,537 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:11,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:11,537 INFO L225 Difference]: With dead ends: 431 [2021-07-09 17:39:11,537 INFO L226 Difference]: Without dead ends: 431 [2021-07-09 17:39:11,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:39:11,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-07-09 17:39:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 325. [2021-07-09 17:39:11,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.947530864197531) internal successors, (955), 324 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:11,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 955 transitions. [2021-07-09 17:39:11,541 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 955 transitions. Word has length 22 [2021-07-09 17:39:11,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:11,541 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 955 transitions. [2021-07-09 17:39:11,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 955 transitions. [2021-07-09 17:39:11,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:11,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:11,542 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:11,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:11,758 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:11,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:11,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1676258398, now seen corresponding path program 122 times [2021-07-09 17:39:11,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:11,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735185672] [2021-07-09 17:39:11,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:11,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:11,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735185672] [2021-07-09 17:39:11,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735185672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:11,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101267210] [2021-07-09 17:39:11,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:11,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:11,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:11,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:11,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:12,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101267210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:12,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:12,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:12,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679858605] [2021-07-09 17:39:12,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:12,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:12,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:12,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:12,027 INFO L87 Difference]: Start difference. First operand 325 states and 955 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:12,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:12,324 INFO L93 Difference]: Finished difference Result 688 states and 1965 transitions. [2021-07-09 17:39:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:39:12,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:12,325 INFO L225 Difference]: With dead ends: 688 [2021-07-09 17:39:12,325 INFO L226 Difference]: Without dead ends: 688 [2021-07-09 17:39:12,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 305.0ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-07-09 17:39:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 339. [2021-07-09 17:39:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0118343195266273) internal successors, (1018), 338 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1018 transitions. [2021-07-09 17:39:12,330 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1018 transitions. Word has length 22 [2021-07-09 17:39:12,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:12,330 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1018 transitions. [2021-07-09 17:39:12,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1018 transitions. [2021-07-09 17:39:12,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:12,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:12,330 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:12,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-07-09 17:39:12,546 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:12,546 INFO L82 PathProgramCache]: Analyzing trace with hash -181655434, now seen corresponding path program 123 times [2021-07-09 17:39:12,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:12,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101810457] [2021-07-09 17:39:12,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:12,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:12,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101810457] [2021-07-09 17:39:12,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101810457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:12,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771630788] [2021-07-09 17:39:12,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:12,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:39:12,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:12,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:12,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:12,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771630788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:12,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:12,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:12,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227632132] [2021-07-09 17:39:12,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:12,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:12,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:12,858 INFO L87 Difference]: Start difference. First operand 339 states and 1018 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:13,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:13,089 INFO L93 Difference]: Finished difference Result 627 states and 1798 transitions. [2021-07-09 17:39:13,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:39:13,089 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:13,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:13,090 INFO L225 Difference]: With dead ends: 627 [2021-07-09 17:39:13,090 INFO L226 Difference]: Without dead ends: 617 [2021-07-09 17:39:13,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 256.2ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:39:13,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-07-09 17:39:13,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 346. [2021-07-09 17:39:13,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.991304347826087) internal successors, (1032), 345 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:13,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1032 transitions. [2021-07-09 17:39:13,095 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1032 transitions. Word has length 22 [2021-07-09 17:39:13,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:13,095 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1032 transitions. [2021-07-09 17:39:13,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:13,095 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1032 transitions. [2021-07-09 17:39:13,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:13,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:13,095 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:13,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-07-09 17:39:13,309 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:13,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1268876522, now seen corresponding path program 124 times [2021-07-09 17:39:13,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:13,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969669133] [2021-07-09 17:39:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:13,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:13,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969669133] [2021-07-09 17:39:13,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969669133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:13,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804515917] [2021-07-09 17:39:13,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:13,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:13,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:13,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:13,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:13,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804515917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:13,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:13,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:13,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587003724] [2021-07-09 17:39:13,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:13,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:13,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:13,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:13,574 INFO L87 Difference]: Start difference. First operand 346 states and 1032 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:13,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:13,770 INFO L93 Difference]: Finished difference Result 621 states and 1807 transitions. [2021-07-09 17:39:13,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:13,770 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:13,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:13,771 INFO L225 Difference]: With dead ends: 621 [2021-07-09 17:39:13,771 INFO L226 Difference]: Without dead ends: 621 [2021-07-09 17:39:13,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:39:13,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-07-09 17:39:13,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 352. [2021-07-09 17:39:13,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.017094017094017) internal successors, (1059), 351 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:13,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1059 transitions. [2021-07-09 17:39:13,776 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1059 transitions. Word has length 22 [2021-07-09 17:39:13,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:13,776 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1059 transitions. [2021-07-09 17:39:13,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:13,776 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1059 transitions. [2021-07-09 17:39:13,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:13,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:13,777 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:13,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-07-09 17:39:13,993 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:13,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:13,993 INFO L82 PathProgramCache]: Analyzing trace with hash -243142922, now seen corresponding path program 125 times [2021-07-09 17:39:13,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:13,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851003205] [2021-07-09 17:39:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:14,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:14,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851003205] [2021-07-09 17:39:14,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851003205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:14,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077362846] [2021-07-09 17:39:14,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:14,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:14,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:14,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:14,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:14,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077362846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:14,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:14,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:14,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947109234] [2021-07-09 17:39:14,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:14,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:14,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:14,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:14,252 INFO L87 Difference]: Start difference. First operand 352 states and 1059 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:14,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:14,529 INFO L93 Difference]: Finished difference Result 637 states and 1834 transitions. [2021-07-09 17:39:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:14,529 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:14,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:14,530 INFO L225 Difference]: With dead ends: 637 [2021-07-09 17:39:14,530 INFO L226 Difference]: Without dead ends: 628 [2021-07-09 17:39:14,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:14,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-07-09 17:39:14,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 358. [2021-07-09 17:39:14,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.0) internal successors, (1071), 357 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1071 transitions. [2021-07-09 17:39:14,535 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1071 transitions. Word has length 22 [2021-07-09 17:39:14,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:14,535 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 1071 transitions. [2021-07-09 17:39:14,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:14,535 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1071 transitions. [2021-07-09 17:39:14,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:14,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:14,535 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:14,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1367 [2021-07-09 17:39:14,751 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:14,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:14,752 INFO L82 PathProgramCache]: Analyzing trace with hash -465703288, now seen corresponding path program 126 times [2021-07-09 17:39:14,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:14,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852846254] [2021-07-09 17:39:14,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:14,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:14,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852846254] [2021-07-09 17:39:14,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852846254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:14,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717088649] [2021-07-09 17:39:14,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:14,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:14,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:14,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:14,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:15,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717088649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:15,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:15,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:15,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690980816] [2021-07-09 17:39:15,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:15,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:15,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:15,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:15,017 INFO L87 Difference]: Start difference. First operand 358 states and 1071 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:15,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:15,311 INFO L93 Difference]: Finished difference Result 592 states and 1704 transitions. [2021-07-09 17:39:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:39:15,311 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:15,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:15,312 INFO L225 Difference]: With dead ends: 592 [2021-07-09 17:39:15,312 INFO L226 Difference]: Without dead ends: 582 [2021-07-09 17:39:15,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 265.1ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:39:15,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-07-09 17:39:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 370. [2021-07-09 17:39:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.005420054200542) internal successors, (1109), 369 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1109 transitions. [2021-07-09 17:39:15,317 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1109 transitions. Word has length 22 [2021-07-09 17:39:15,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:15,317 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1109 transitions. [2021-07-09 17:39:15,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1109 transitions. [2021-07-09 17:39:15,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:15,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:15,318 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:15,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1378 [2021-07-09 17:39:15,533 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:15,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:15,533 INFO L82 PathProgramCache]: Analyzing trace with hash -647793600, now seen corresponding path program 127 times [2021-07-09 17:39:15,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:15,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732881707] [2021-07-09 17:39:15,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:15,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:15,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732881707] [2021-07-09 17:39:15,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732881707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:15,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042150827] [2021-07-09 17:39:15,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:15,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:15,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:15,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042150827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:15,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:15,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:15,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764352776] [2021-07-09 17:39:15,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:15,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:15,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:15,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:15,787 INFO L87 Difference]: Start difference. First operand 370 states and 1109 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:16,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:16,027 INFO L93 Difference]: Finished difference Result 623 states and 1767 transitions. [2021-07-09 17:39:16,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:16,028 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:16,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:16,029 INFO L225 Difference]: With dead ends: 623 [2021-07-09 17:39:16,029 INFO L226 Difference]: Without dead ends: 611 [2021-07-09 17:39:16,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:39:16,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-07-09 17:39:16,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 366. [2021-07-09 17:39:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.0054794520547947) internal successors, (1097), 365 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:16,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1097 transitions. [2021-07-09 17:39:16,058 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1097 transitions. Word has length 22 [2021-07-09 17:39:16,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:16,058 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1097 transitions. [2021-07-09 17:39:16,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:16,059 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1097 transitions. [2021-07-09 17:39:16,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:16,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:16,059 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:16,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1391,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:16,260 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:16,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1770086426, now seen corresponding path program 128 times [2021-07-09 17:39:16,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:16,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012471092] [2021-07-09 17:39:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:16,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:16,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012471092] [2021-07-09 17:39:16,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012471092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:16,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915339496] [2021-07-09 17:39:16,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:16,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:16,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:16,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:16,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:16,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915339496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:16,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:16,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:16,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744663353] [2021-07-09 17:39:16,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:16,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:16,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:16,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:16,553 INFO L87 Difference]: Start difference. First operand 366 states and 1097 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:16,870 INFO L93 Difference]: Finished difference Result 571 states and 1657 transitions. [2021-07-09 17:39:16,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:39:16,870 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:16,871 INFO L225 Difference]: With dead ends: 571 [2021-07-09 17:39:16,871 INFO L226 Difference]: Without dead ends: 571 [2021-07-09 17:39:16,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-07-09 17:39:16,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 371. [2021-07-09 17:39:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.0) internal successors, (1110), 370 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1110 transitions. [2021-07-09 17:39:16,878 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1110 transitions. Word has length 22 [2021-07-09 17:39:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:16,878 INFO L482 AbstractCegarLoop]: Abstraction has 371 states and 1110 transitions. [2021-07-09 17:39:16,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1110 transitions. [2021-07-09 17:39:16,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:16,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:16,878 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:17,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1400 [2021-07-09 17:39:17,094 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:17,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:17,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1030277906, now seen corresponding path program 129 times [2021-07-09 17:39:17,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:17,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266967546] [2021-07-09 17:39:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:17,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:17,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266967546] [2021-07-09 17:39:17,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266967546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:17,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675836920] [2021-07-09 17:39:17,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:17,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:39:17,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:17,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:17,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:17,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675836920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:17,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:17,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:17,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859494020] [2021-07-09 17:39:17,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:17,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:17,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:17,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:17,347 INFO L87 Difference]: Start difference. First operand 371 states and 1110 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:17,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:17,592 INFO L93 Difference]: Finished difference Result 543 states and 1580 transitions. [2021-07-09 17:39:17,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:39:17,592 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:17,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:17,593 INFO L225 Difference]: With dead ends: 543 [2021-07-09 17:39:17,593 INFO L226 Difference]: Without dead ends: 533 [2021-07-09 17:39:17,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:39:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-07-09 17:39:17,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 350. [2021-07-09 17:39:17,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.9713467048710602) internal successors, (1037), 349 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:17,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1037 transitions. [2021-07-09 17:39:17,597 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1037 transitions. Word has length 22 [2021-07-09 17:39:17,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:17,598 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1037 transitions. [2021-07-09 17:39:17,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:17,598 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1037 transitions. [2021-07-09 17:39:17,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:17,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:17,598 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:17,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1409,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:17,815 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:17,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:17,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1576611606, now seen corresponding path program 130 times [2021-07-09 17:39:17,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:17,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675107503] [2021-07-09 17:39:17,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:17,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:17,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675107503] [2021-07-09 17:39:17,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675107503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:17,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950298326] [2021-07-09 17:39:17,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:17,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:17,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:17,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:17,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:18,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950298326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:18,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:18,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:18,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630500428] [2021-07-09 17:39:18,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:18,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:18,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:18,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:18,096 INFO L87 Difference]: Start difference. First operand 350 states and 1037 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:18,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:18,345 INFO L93 Difference]: Finished difference Result 476 states and 1410 transitions. [2021-07-09 17:39:18,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:18,345 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:18,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:18,346 INFO L225 Difference]: With dead ends: 476 [2021-07-09 17:39:18,346 INFO L226 Difference]: Without dead ends: 476 [2021-07-09 17:39:18,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:39:18,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-09 17:39:18,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 347. [2021-07-09 17:39:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.9710982658959537) internal successors, (1028), 346 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:18,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1028 transitions. [2021-07-09 17:39:18,350 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1028 transitions. Word has length 22 [2021-07-09 17:39:18,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:18,351 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1028 transitions. [2021-07-09 17:39:18,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:18,351 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1028 transitions. [2021-07-09 17:39:18,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:18,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:18,351 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:18,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1418,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:18,567 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:18,568 INFO L82 PathProgramCache]: Analyzing trace with hash -852679658, now seen corresponding path program 131 times [2021-07-09 17:39:18,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:18,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942987701] [2021-07-09 17:39:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:18,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:18,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942987701] [2021-07-09 17:39:18,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942987701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:18,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640356482] [2021-07-09 17:39:18,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:18,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:18,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:18,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:18,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:18,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640356482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:18,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:18,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:18,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745242207] [2021-07-09 17:39:18,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:18,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:18,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:18,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:18,832 INFO L87 Difference]: Start difference. First operand 347 states and 1028 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:19,043 INFO L93 Difference]: Finished difference Result 525 states and 1504 transitions. [2021-07-09 17:39:19,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:19,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:19,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:19,044 INFO L225 Difference]: With dead ends: 525 [2021-07-09 17:39:19,044 INFO L226 Difference]: Without dead ends: 525 [2021-07-09 17:39:19,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:39:19,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-07-09 17:39:19,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 355. [2021-07-09 17:39:19,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.983050847457627) internal successors, (1056), 354 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1056 transitions. [2021-07-09 17:39:19,049 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1056 transitions. Word has length 22 [2021-07-09 17:39:19,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:19,049 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1056 transitions. [2021-07-09 17:39:19,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:19,049 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1056 transitions. [2021-07-09 17:39:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:19,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:19,049 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:19,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1422 [2021-07-09 17:39:19,265 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:19,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:19,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1930268194, now seen corresponding path program 132 times [2021-07-09 17:39:19,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:19,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256323357] [2021-07-09 17:39:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:19,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:19,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256323357] [2021-07-09 17:39:19,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256323357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:19,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938221727] [2021-07-09 17:39:19,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:19,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:19,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:19,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:19,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:19,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938221727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:19,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:19,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:19,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097712351] [2021-07-09 17:39:19,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:19,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:19,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:19,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:19,533 INFO L87 Difference]: Start difference. First operand 355 states and 1056 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:19,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:19,830 INFO L93 Difference]: Finished difference Result 496 states and 1427 transitions. [2021-07-09 17:39:19,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:19,830 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:19,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:19,831 INFO L225 Difference]: With dead ends: 496 [2021-07-09 17:39:19,831 INFO L226 Difference]: Without dead ends: 487 [2021-07-09 17:39:19,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-09 17:39:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 355. [2021-07-09 17:39:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.9548022598870056) internal successors, (1046), 354 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1046 transitions. [2021-07-09 17:39:19,835 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1046 transitions. Word has length 22 [2021-07-09 17:39:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:19,835 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1046 transitions. [2021-07-09 17:39:19,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1046 transitions. [2021-07-09 17:39:19,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:19,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:19,836 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:20,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1430 [2021-07-09 17:39:20,052 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:20,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:20,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1752344734, now seen corresponding path program 133 times [2021-07-09 17:39:20,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:20,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855156759] [2021-07-09 17:39:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:20,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:20,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855156759] [2021-07-09 17:39:20,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855156759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:20,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489012396] [2021-07-09 17:39:20,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:20,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:20,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:20,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489012396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:20,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:20,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:20,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378184608] [2021-07-09 17:39:20,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:20,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:20,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:20,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:20,320 INFO L87 Difference]: Start difference. First operand 355 states and 1046 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:20,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:20,602 INFO L93 Difference]: Finished difference Result 435 states and 1284 transitions. [2021-07-09 17:39:20,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:20,602 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:20,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:20,603 INFO L225 Difference]: With dead ends: 435 [2021-07-09 17:39:20,603 INFO L226 Difference]: Without dead ends: 435 [2021-07-09 17:39:20,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:39:20,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-09 17:39:20,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 324. [2021-07-09 17:39:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-07-09 17:39:20,607 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-07-09 17:39:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:20,607 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-07-09 17:39:20,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-07-09 17:39:20,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:20,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:20,608 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:20,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1441 [2021-07-09 17:39:20,820 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:20,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1705035186, now seen corresponding path program 134 times [2021-07-09 17:39:20,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:20,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136729935] [2021-07-09 17:39:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:20,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:20,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136729935] [2021-07-09 17:39:20,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136729935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:20,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094701179] [2021-07-09 17:39:20,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:20,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:20,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:20,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:20,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:21,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094701179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:21,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:21,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:21,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981629818] [2021-07-09 17:39:21,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:21,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:21,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:21,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:21,098 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:21,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:21,447 INFO L93 Difference]: Finished difference Result 750 states and 2186 transitions. [2021-07-09 17:39:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:21,447 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:21,448 INFO L225 Difference]: With dead ends: 750 [2021-07-09 17:39:21,449 INFO L226 Difference]: Without dead ends: 750 [2021-07-09 17:39:21,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 340.0ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-07-09 17:39:21,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 344. [2021-07-09 17:39:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.008746355685131) internal successors, (1032), 343 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:21,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1032 transitions. [2021-07-09 17:39:21,454 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1032 transitions. Word has length 22 [2021-07-09 17:39:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:21,454 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1032 transitions. [2021-07-09 17:39:21,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1032 transitions. [2021-07-09 17:39:21,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:21,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:21,454 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:21,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1448 [2021-07-09 17:39:21,663 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:21,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:21,663 INFO L82 PathProgramCache]: Analyzing trace with hash -210432222, now seen corresponding path program 135 times [2021-07-09 17:39:21,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:21,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535440286] [2021-07-09 17:39:21,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:21,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:21,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535440286] [2021-07-09 17:39:21,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535440286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:21,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071935593] [2021-07-09 17:39:21,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:21,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:39:21,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:21,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:21,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:21,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071935593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:21,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:21,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:21,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333740574] [2021-07-09 17:39:21,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:21,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:21,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:21,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:21,945 INFO L87 Difference]: Start difference. First operand 344 states and 1032 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:22,595 INFO L93 Difference]: Finished difference Result 773 states and 2241 transitions. [2021-07-09 17:39:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:39:22,596 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:22,597 INFO L225 Difference]: With dead ends: 773 [2021-07-09 17:39:22,597 INFO L226 Difference]: Without dead ends: 763 [2021-07-09 17:39:22,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 578.4ms TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:39:22,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-07-09 17:39:22,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 341. [2021-07-09 17:39:22,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0) internal successors, (1020), 340 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1020 transitions. [2021-07-09 17:39:22,602 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1020 transitions. Word has length 22 [2021-07-09 17:39:22,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:22,602 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1020 transitions. [2021-07-09 17:39:22,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:22,602 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1020 transitions. [2021-07-09 17:39:22,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:22,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:22,602 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:22,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-07-09 17:39:22,817 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:22,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:22,817 INFO L82 PathProgramCache]: Analyzing trace with hash 214514988, now seen corresponding path program 136 times [2021-07-09 17:39:22,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:22,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803612446] [2021-07-09 17:39:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:22,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:22,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803612446] [2021-07-09 17:39:22,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803612446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:22,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17251160] [2021-07-09 17:39:22,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:22,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:22,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:22,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:22,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:23,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17251160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:23,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:23,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:23,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255165771] [2021-07-09 17:39:23,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:23,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:23,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:23,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:23,096 INFO L87 Difference]: Start difference. First operand 341 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:23,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:23,515 INFO L93 Difference]: Finished difference Result 747 states and 2178 transitions. [2021-07-09 17:39:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:39:23,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:23,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:23,516 INFO L225 Difference]: With dead ends: 747 [2021-07-09 17:39:23,516 INFO L226 Difference]: Without dead ends: 727 [2021-07-09 17:39:23,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:23,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-07-09 17:39:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 338. [2021-07-09 17:39:23,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9910979228486645) internal successors, (1008), 337 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:23,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1008 transitions. [2021-07-09 17:39:23,521 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1008 transitions. Word has length 22 [2021-07-09 17:39:23,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:23,521 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1008 transitions. [2021-07-09 17:39:23,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:23,521 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1008 transitions. [2021-07-09 17:39:23,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:23,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:23,522 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:23,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1473 [2021-07-09 17:39:23,729 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:23,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:23,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1986111548, now seen corresponding path program 137 times [2021-07-09 17:39:23,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:23,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241278589] [2021-07-09 17:39:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:23,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:23,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241278589] [2021-07-09 17:39:23,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241278589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:23,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721913660] [2021-07-09 17:39:23,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:23,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:23,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:23,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:23,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:24,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721913660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:24,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:24,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:24,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147566121] [2021-07-09 17:39:24,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:24,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:24,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:24,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:24,000 INFO L87 Difference]: Start difference. First operand 338 states and 1008 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:24,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:24,351 INFO L93 Difference]: Finished difference Result 756 states and 2173 transitions. [2021-07-09 17:39:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:24,351 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:24,352 INFO L225 Difference]: With dead ends: 756 [2021-07-09 17:39:24,352 INFO L226 Difference]: Without dead ends: 720 [2021-07-09 17:39:24,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 338.5ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-07-09 17:39:24,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 332. [2021-07-09 17:39:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.972809667673716) internal successors, (984), 331 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:24,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 984 transitions. [2021-07-09 17:39:24,357 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 984 transitions. Word has length 22 [2021-07-09 17:39:24,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:24,357 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 984 transitions. [2021-07-09 17:39:24,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:24,357 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 984 transitions. [2021-07-09 17:39:24,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:24,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:24,358 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:24,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1481,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:24,573 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:24,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:24,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1654265104, now seen corresponding path program 138 times [2021-07-09 17:39:24,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:24,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198672491] [2021-07-09 17:39:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:24,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:24,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198672491] [2021-07-09 17:39:24,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198672491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:24,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606146469] [2021-07-09 17:39:24,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:24,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:39:24,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:24,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:24,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:24,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606146469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:24,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:24,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:24,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749316843] [2021-07-09 17:39:24,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:24,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:24,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:24,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:24,851 INFO L87 Difference]: Start difference. First operand 332 states and 984 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:25,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:25,242 INFO L93 Difference]: Finished difference Result 659 states and 1924 transitions. [2021-07-09 17:39:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:25,242 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:25,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:25,243 INFO L225 Difference]: With dead ends: 659 [2021-07-09 17:39:25,243 INFO L226 Difference]: Without dead ends: 659 [2021-07-09 17:39:25,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:25,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-07-09 17:39:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 340. [2021-07-09 17:39:25,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0) internal successors, (1017), 339 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1017 transitions. [2021-07-09 17:39:25,248 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1017 transitions. Word has length 22 [2021-07-09 17:39:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:25,248 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1017 transitions. [2021-07-09 17:39:25,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:25,248 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1017 transitions. [2021-07-09 17:39:25,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:25,248 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:25,248 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:25,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1489 [2021-07-09 17:39:25,464 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:25,465 INFO L82 PathProgramCache]: Analyzing trace with hash -159662140, now seen corresponding path program 139 times [2021-07-09 17:39:25,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:25,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013867324] [2021-07-09 17:39:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:25,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:25,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013867324] [2021-07-09 17:39:25,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013867324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:25,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815949185] [2021-07-09 17:39:25,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:25,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:25,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:25,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815949185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:25,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:25,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:25,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773738537] [2021-07-09 17:39:25,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:25,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:25,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:25,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:25,775 INFO L87 Difference]: Start difference. First operand 340 states and 1017 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:26,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:26,710 INFO L93 Difference]: Finished difference Result 743 states and 2162 transitions. [2021-07-09 17:39:26,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:39:26,710 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:26,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:26,711 INFO L225 Difference]: With dead ends: 743 [2021-07-09 17:39:26,711 INFO L226 Difference]: Without dead ends: 733 [2021-07-09 17:39:26,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 826.3ms TimeCoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:39:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-07-09 17:39:26,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 337. [2021-07-09 17:39:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9910714285714284) internal successors, (1005), 336 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:26,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1005 transitions. [2021-07-09 17:39:26,716 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1005 transitions. Word has length 22 [2021-07-09 17:39:26,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:26,716 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1005 transitions. [2021-07-09 17:39:26,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:26,716 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1005 transitions. [2021-07-09 17:39:26,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:26,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:26,717 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:26,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1501,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:26,933 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:26,933 INFO L82 PathProgramCache]: Analyzing trace with hash 265285070, now seen corresponding path program 140 times [2021-07-09 17:39:26,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:26,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252645570] [2021-07-09 17:39:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:26,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:26,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252645570] [2021-07-09 17:39:26,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252645570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:26,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280772598] [2021-07-09 17:39:26,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:27,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:27,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:27,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:27,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:27,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280772598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:27,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:27,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:27,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044058221] [2021-07-09 17:39:27,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:27,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:27,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:27,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:27,222 INFO L87 Difference]: Start difference. First operand 337 states and 1005 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:27,833 INFO L93 Difference]: Finished difference Result 667 states and 1949 transitions. [2021-07-09 17:39:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:39:27,833 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:27,834 INFO L225 Difference]: With dead ends: 667 [2021-07-09 17:39:27,834 INFO L226 Difference]: Without dead ends: 647 [2021-07-09 17:39:27,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 497.4ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:39:27,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-07-09 17:39:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 334. [2021-07-09 17:39:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.981981981981982) internal successors, (993), 333 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 993 transitions. [2021-07-09 17:39:27,839 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 993 transitions. Word has length 22 [2021-07-09 17:39:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:27,839 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 993 transitions. [2021-07-09 17:39:27,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 993 transitions. [2021-07-09 17:39:27,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:27,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:27,840 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:28,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1513 [2021-07-09 17:39:28,056 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:28,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:28,056 INFO L82 PathProgramCache]: Analyzing trace with hash -549395800, now seen corresponding path program 141 times [2021-07-09 17:39:28,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:28,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893313963] [2021-07-09 17:39:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:28,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:28,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893313963] [2021-07-09 17:39:28,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893313963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:28,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455411544] [2021-07-09 17:39:28,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:28,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:39:28,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:28,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:28,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:28,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455411544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:28,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:28,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:28,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517475276] [2021-07-09 17:39:28,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:28,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:28,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:28,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:28,343 INFO L87 Difference]: Start difference. First operand 334 states and 993 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:28,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:28,940 INFO L93 Difference]: Finished difference Result 777 states and 2260 transitions. [2021-07-09 17:39:28,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:39:28,940 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:28,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:28,941 INFO L225 Difference]: With dead ends: 777 [2021-07-09 17:39:28,941 INFO L226 Difference]: Without dead ends: 777 [2021-07-09 17:39:28,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 528.4ms TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-07-09 17:39:28,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 344. [2021-07-09 17:39:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.0320699708454812) internal successors, (1040), 343 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:28,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1040 transitions. [2021-07-09 17:39:28,946 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1040 transitions. Word has length 22 [2021-07-09 17:39:28,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:28,946 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1040 transitions. [2021-07-09 17:39:28,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1040 transitions. [2021-07-09 17:39:28,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:28,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:28,947 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:29,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1521 [2021-07-09 17:39:29,156 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:29,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:29,156 INFO L82 PathProgramCache]: Analyzing trace with hash 945207164, now seen corresponding path program 142 times [2021-07-09 17:39:29,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:29,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108702337] [2021-07-09 17:39:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:29,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:29,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108702337] [2021-07-09 17:39:29,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108702337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:29,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019676191] [2021-07-09 17:39:29,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:29,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:29,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:29,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:29,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:29,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019676191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:29,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:29,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:29,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574890802] [2021-07-09 17:39:29,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:29,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:29,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:29,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:29,444 INFO L87 Difference]: Start difference. First operand 344 states and 1040 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:30,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:30,571 INFO L93 Difference]: Finished difference Result 860 states and 2485 transitions. [2021-07-09 17:39:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:39:30,571 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:30,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:30,572 INFO L225 Difference]: With dead ends: 860 [2021-07-09 17:39:30,573 INFO L226 Difference]: Without dead ends: 850 [2021-07-09 17:39:30,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 986.4ms TimeCoverageRelationStatistics Valid=355, Invalid=1205, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:39:30,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-07-09 17:39:30,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 351. [2021-07-09 17:39:30,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0114285714285716) internal successors, (1054), 350 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1054 transitions. [2021-07-09 17:39:30,578 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1054 transitions. Word has length 22 [2021-07-09 17:39:30,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:30,578 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1054 transitions. [2021-07-09 17:39:30,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:30,578 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1054 transitions. [2021-07-09 17:39:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:30,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:30,579 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:30,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:30,789 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:30,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1899228176, now seen corresponding path program 143 times [2021-07-09 17:39:30,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:30,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045188752] [2021-07-09 17:39:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:30,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:30,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045188752] [2021-07-09 17:39:30,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045188752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:30,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972950369] [2021-07-09 17:39:30,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:30,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:30,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:30,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:30,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:31,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972950369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:31,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:31,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:31,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817956414] [2021-07-09 17:39:31,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:31,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:31,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:31,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:31,109 INFO L87 Difference]: Start difference. First operand 351 states and 1054 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:31,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:31,416 INFO L93 Difference]: Finished difference Result 710 states and 2069 transitions. [2021-07-09 17:39:31,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:31,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:31,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:31,417 INFO L225 Difference]: With dead ends: 710 [2021-07-09 17:39:31,417 INFO L226 Difference]: Without dead ends: 710 [2021-07-09 17:39:31,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 349.2ms TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-07-09 17:39:31,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 342. [2021-07-09 17:39:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0175953079178885) internal successors, (1029), 341 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1029 transitions. [2021-07-09 17:39:31,424 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1029 transitions. Word has length 22 [2021-07-09 17:39:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:31,424 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1029 transitions. [2021-07-09 17:39:31,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:31,424 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1029 transitions. [2021-07-09 17:39:31,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:31,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:31,424 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:31,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1546 [2021-07-09 17:39:31,637 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:31,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:31,638 INFO L82 PathProgramCache]: Analyzing trace with hash 883719676, now seen corresponding path program 144 times [2021-07-09 17:39:31,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:31,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598203454] [2021-07-09 17:39:31,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:31,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:31,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598203454] [2021-07-09 17:39:31,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598203454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:31,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315810862] [2021-07-09 17:39:31,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:31,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:39:31,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:31,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:31,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:31,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315810862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:31,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:31,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:31,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072443103] [2021-07-09 17:39:31,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:31,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:31,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:31,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:31,938 INFO L87 Difference]: Start difference. First operand 342 states and 1029 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:32,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:32,294 INFO L93 Difference]: Finished difference Result 701 states and 2021 transitions. [2021-07-09 17:39:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:32,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:32,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:32,295 INFO L225 Difference]: With dead ends: 701 [2021-07-09 17:39:32,295 INFO L226 Difference]: Without dead ends: 692 [2021-07-09 17:39:32,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 356.0ms TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-07-09 17:39:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 348. [2021-07-09 17:39:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.0) internal successors, (1041), 347 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1041 transitions. [2021-07-09 17:39:32,300 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1041 transitions. Word has length 22 [2021-07-09 17:39:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:32,300 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1041 transitions. [2021-07-09 17:39:32,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1041 transitions. [2021-07-09 17:39:32,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:32,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:32,301 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:32,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1557,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:32,516 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:32,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:32,517 INFO L82 PathProgramCache]: Analyzing trace with hash 661159310, now seen corresponding path program 145 times [2021-07-09 17:39:32,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:32,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692489405] [2021-07-09 17:39:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:32,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:32,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692489405] [2021-07-09 17:39:32,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692489405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:32,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355654561] [2021-07-09 17:39:32,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:32,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:32,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:32,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355654561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:32,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:32,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:32,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437589012] [2021-07-09 17:39:32,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:32,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:32,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:32,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:32,771 INFO L87 Difference]: Start difference. First operand 348 states and 1041 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:33,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:33,771 INFO L93 Difference]: Finished difference Result 796 states and 2271 transitions. [2021-07-09 17:39:33,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:39:33,771 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:33,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:33,772 INFO L225 Difference]: With dead ends: 796 [2021-07-09 17:39:33,773 INFO L226 Difference]: Without dead ends: 786 [2021-07-09 17:39:33,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 864.0ms TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:39:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-07-09 17:39:33,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 370. [2021-07-09 17:39:33,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.994579945799458) internal successors, (1105), 369 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:33,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1105 transitions. [2021-07-09 17:39:33,778 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1105 transitions. Word has length 22 [2021-07-09 17:39:33,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:33,778 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1105 transitions. [2021-07-09 17:39:33,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:33,778 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1105 transitions. [2021-07-09 17:39:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:33,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:33,779 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:33,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1570,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:33,995 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:33,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:33,995 INFO L82 PathProgramCache]: Analyzing trace with hash 479068998, now seen corresponding path program 146 times [2021-07-09 17:39:33,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:33,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142172698] [2021-07-09 17:39:33,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:34,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:34,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142172698] [2021-07-09 17:39:34,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142172698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:34,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257711488] [2021-07-09 17:39:34,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:34,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:34,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:34,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:34,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:34,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257711488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:34,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:34,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:34,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968408046] [2021-07-09 17:39:34,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:34,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:34,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:34,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:34,271 INFO L87 Difference]: Start difference. First operand 370 states and 1105 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:35,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:35,146 INFO L93 Difference]: Finished difference Result 786 states and 2232 transitions. [2021-07-09 17:39:35,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:39:35,146 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:35,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:35,148 INFO L225 Difference]: With dead ends: 786 [2021-07-09 17:39:35,148 INFO L226 Difference]: Without dead ends: 774 [2021-07-09 17:39:35,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 798.3ms TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:39:35,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-07-09 17:39:35,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 350. [2021-07-09 17:39:35,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.994269340974212) internal successors, (1045), 349 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1045 transitions. [2021-07-09 17:39:35,153 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1045 transitions. Word has length 22 [2021-07-09 17:39:35,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:35,153 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1045 transitions. [2021-07-09 17:39:35,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:35,153 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1045 transitions. [2021-07-09 17:39:35,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:35,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:35,154 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:35,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1584 [2021-07-09 17:39:35,369 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:35,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:35,369 INFO L82 PathProgramCache]: Analyzing trace with hash 49736188, now seen corresponding path program 147 times [2021-07-09 17:39:35,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:35,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271965218] [2021-07-09 17:39:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:35,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:35,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271965218] [2021-07-09 17:39:35,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271965218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:35,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810180023] [2021-07-09 17:39:35,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:35,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:35,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:35,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:35,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:35,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810180023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:35,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:35,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:35,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312344574] [2021-07-09 17:39:35,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:35,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:35,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:35,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:35,629 INFO L87 Difference]: Start difference. First operand 350 states and 1045 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:36,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:36,092 INFO L93 Difference]: Finished difference Result 649 states and 1895 transitions. [2021-07-09 17:39:36,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:39:36,092 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:36,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:36,093 INFO L225 Difference]: With dead ends: 649 [2021-07-09 17:39:36,093 INFO L226 Difference]: Without dead ends: 629 [2021-07-09 17:39:36,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 426.8ms TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:36,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-07-09 17:39:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 356. [2021-07-09 17:39:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.980281690140845) internal successors, (1058), 355 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:36,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1058 transitions. [2021-07-09 17:39:36,098 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1058 transitions. Word has length 22 [2021-07-09 17:39:36,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:36,098 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1058 transitions. [2021-07-09 17:39:36,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:36,099 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1058 transitions. [2021-07-09 17:39:36,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:36,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:36,099 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:36,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-07-09 17:39:36,315 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:36,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:36,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1300096188, now seen corresponding path program 148 times [2021-07-09 17:39:36,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:36,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057107548] [2021-07-09 17:39:36,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:36,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:36,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057107548] [2021-07-09 17:39:36,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057107548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:36,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111314230] [2021-07-09 17:39:36,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:36,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:36,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:36,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:36,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:36,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111314230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:36,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:36,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:36,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380571033] [2021-07-09 17:39:36,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:36,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:36,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:36,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:36,579 INFO L87 Difference]: Start difference. First operand 356 states and 1058 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:37,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:37,203 INFO L93 Difference]: Finished difference Result 727 states and 2073 transitions. [2021-07-09 17:39:37,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:39:37,203 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:37,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:37,204 INFO L225 Difference]: With dead ends: 727 [2021-07-09 17:39:37,204 INFO L226 Difference]: Without dead ends: 717 [2021-07-09 17:39:37,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 552.2ms TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:39:37,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-07-09 17:39:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 378. [2021-07-09 17:39:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.976127320954907) internal successors, (1122), 377 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1122 transitions. [2021-07-09 17:39:37,210 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1122 transitions. Word has length 22 [2021-07-09 17:39:37,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:37,210 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1122 transitions. [2021-07-09 17:39:37,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:37,210 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1122 transitions. [2021-07-09 17:39:37,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:37,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:37,210 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:37,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1605 [2021-07-09 17:39:37,426 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:37,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:37,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1482186500, now seen corresponding path program 149 times [2021-07-09 17:39:37,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:37,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496080450] [2021-07-09 17:39:37,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:37,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:37,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496080450] [2021-07-09 17:39:37,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496080450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:37,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493286251] [2021-07-09 17:39:37,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:37,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:37,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:37,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:37,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:37,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493286251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:37,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:37,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:37,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586526792] [2021-07-09 17:39:37,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:37,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:37,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:37,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:37,746 INFO L87 Difference]: Start difference. First operand 378 states and 1122 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:38,170 INFO L93 Difference]: Finished difference Result 684 states and 1962 transitions. [2021-07-09 17:39:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:39:38,171 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:38,172 INFO L225 Difference]: With dead ends: 684 [2021-07-09 17:39:38,172 INFO L226 Difference]: Without dead ends: 669 [2021-07-09 17:39:38,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 420.4ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-07-09 17:39:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 352. [2021-07-09 17:39:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.988603988603989) internal successors, (1049), 351 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1049 transitions. [2021-07-09 17:39:38,176 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1049 transitions. Word has length 22 [2021-07-09 17:39:38,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:38,176 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1049 transitions. [2021-07-09 17:39:38,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1049 transitions. [2021-07-09 17:39:38,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:38,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:38,186 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:38,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1615,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:38,402 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:38,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:38,402 INFO L82 PathProgramCache]: Analyzing trace with hash -400936498, now seen corresponding path program 150 times [2021-07-09 17:39:38,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:38,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256946627] [2021-07-09 17:39:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:38,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:38,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256946627] [2021-07-09 17:39:38,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256946627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:38,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171081586] [2021-07-09 17:39:38,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:38,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:38,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:38,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:38,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:38,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171081586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:38,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:38,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:38,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143076762] [2021-07-09 17:39:38,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:38,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:38,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:38,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:38,676 INFO L87 Difference]: Start difference. First operand 352 states and 1049 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:39,092 INFO L93 Difference]: Finished difference Result 665 states and 1917 transitions. [2021-07-09 17:39:39,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:39,092 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:39,093 INFO L225 Difference]: With dead ends: 665 [2021-07-09 17:39:39,093 INFO L226 Difference]: Without dead ends: 629 [2021-07-09 17:39:39,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 385.2ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-07-09 17:39:39,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 362. [2021-07-09 17:39:39,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.96398891966759) internal successors, (1070), 361 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1070 transitions. [2021-07-09 17:39:39,098 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1070 transitions. Word has length 22 [2021-07-09 17:39:39,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:39,098 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1070 transitions. [2021-07-09 17:39:39,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:39,098 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1070 transitions. [2021-07-09 17:39:39,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:39,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:39,099 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:39,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1627 [2021-07-09 17:39:39,315 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:39,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:39,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1124721900, now seen corresponding path program 151 times [2021-07-09 17:39:39,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:39,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889539571] [2021-07-09 17:39:39,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:39,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:39,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889539571] [2021-07-09 17:39:39,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889539571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:39,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541670183] [2021-07-09 17:39:39,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:39,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:39,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:39,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541670183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:39,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:39,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:39,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075742632] [2021-07-09 17:39:39,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:39,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:39,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:39,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:39,563 INFO L87 Difference]: Start difference. First operand 362 states and 1070 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:39,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:39,938 INFO L93 Difference]: Finished difference Result 609 states and 1767 transitions. [2021-07-09 17:39:39,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:39,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:39,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:39,940 INFO L225 Difference]: With dead ends: 609 [2021-07-09 17:39:39,940 INFO L226 Difference]: Without dead ends: 589 [2021-07-09 17:39:39,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 344.2ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:39,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-07-09 17:39:39,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 368. [2021-07-09 17:39:39,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.9509536784741144) internal successors, (1083), 367 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1083 transitions. [2021-07-09 17:39:39,944 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1083 transitions. Word has length 22 [2021-07-09 17:39:39,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:39,944 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1083 transitions. [2021-07-09 17:39:39,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1083 transitions. [2021-07-09 17:39:39,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:39,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:39,945 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:40,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1637,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:40,149 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:40,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:40,149 INFO L82 PathProgramCache]: Analyzing trace with hash -225110476, now seen corresponding path program 152 times [2021-07-09 17:39:40,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:40,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119305081] [2021-07-09 17:39:40,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:40,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:40,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119305081] [2021-07-09 17:39:40,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119305081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:40,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930973333] [2021-07-09 17:39:40,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:40,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:40,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:40,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:40,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:40,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930973333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:40,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:40,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:40,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723672003] [2021-07-09 17:39:40,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:40,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:40,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:40,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:40,422 INFO L87 Difference]: Start difference. First operand 368 states and 1083 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:40,939 INFO L93 Difference]: Finished difference Result 687 states and 1945 transitions. [2021-07-09 17:39:40,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:39:40,939 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:40,940 INFO L225 Difference]: With dead ends: 687 [2021-07-09 17:39:40,940 INFO L226 Difference]: Without dead ends: 677 [2021-07-09 17:39:40,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 476.1ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:40,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-07-09 17:39:40,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 390. [2021-07-09 17:39:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.948586118251928) internal successors, (1147), 389 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1147 transitions. [2021-07-09 17:39:40,946 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1147 transitions. Word has length 22 [2021-07-09 17:39:40,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:40,946 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1147 transitions. [2021-07-09 17:39:40,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:40,946 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1147 transitions. [2021-07-09 17:39:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:40,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:40,946 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:41,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1645,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:41,162 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:41,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:41,163 INFO L82 PathProgramCache]: Analyzing trace with hash -407200788, now seen corresponding path program 153 times [2021-07-09 17:39:41,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:41,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136949772] [2021-07-09 17:39:41,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:41,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:41,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136949772] [2021-07-09 17:39:41,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136949772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:41,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818487219] [2021-07-09 17:39:41,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:41,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:41,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:41,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:41,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:41,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818487219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:41,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:41,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:41,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341370476] [2021-07-09 17:39:41,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:41,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:41,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:41,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:41,425 INFO L87 Difference]: Start difference. First operand 390 states and 1147 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:41,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:41,778 INFO L93 Difference]: Finished difference Result 644 states and 1834 transitions. [2021-07-09 17:39:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:41,779 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:41,780 INFO L225 Difference]: With dead ends: 644 [2021-07-09 17:39:41,780 INFO L226 Difference]: Without dead ends: 624 [2021-07-09 17:39:41,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 353.6ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:39:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-07-09 17:39:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 355. [2021-07-09 17:39:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.977401129943503) internal successors, (1054), 354 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1054 transitions. [2021-07-09 17:39:41,784 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1054 transitions. Word has length 22 [2021-07-09 17:39:41,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:41,785 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1054 transitions. [2021-07-09 17:39:41,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:41,785 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1054 transitions. [2021-07-09 17:39:41,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:41,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:41,785 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:42,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1655 [2021-07-09 17:39:42,001 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:42,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:42,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1187444538, now seen corresponding path program 154 times [2021-07-09 17:39:42,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:42,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856879218] [2021-07-09 17:39:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:42,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:42,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856879218] [2021-07-09 17:39:42,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856879218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:42,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020003593] [2021-07-09 17:39:42,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:42,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:42,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:42,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:42,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:42,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020003593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:42,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:42,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:42,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787956783] [2021-07-09 17:39:42,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:42,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:42,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:42,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:42,262 INFO L87 Difference]: Start difference. First operand 355 states and 1054 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:42,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:42,578 INFO L93 Difference]: Finished difference Result 643 states and 1857 transitions. [2021-07-09 17:39:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:42,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:42,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:42,579 INFO L225 Difference]: With dead ends: 643 [2021-07-09 17:39:42,579 INFO L226 Difference]: Without dead ends: 643 [2021-07-09 17:39:42,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:39:42,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-07-09 17:39:42,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 364. [2021-07-09 17:39:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.9669421487603307) internal successors, (1077), 363 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:42,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1077 transitions. [2021-07-09 17:39:42,584 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1077 transitions. Word has length 22 [2021-07-09 17:39:42,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:42,584 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 1077 transitions. [2021-07-09 17:39:42,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:42,584 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1077 transitions. [2021-07-09 17:39:42,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:42,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:42,585 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:42,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1665,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:42,801 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:42,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:42,801 INFO L82 PathProgramCache]: Analyzing trace with hash 307158426, now seen corresponding path program 155 times [2021-07-09 17:39:42,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:42,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557104502] [2021-07-09 17:39:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:42,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:42,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557104502] [2021-07-09 17:39:42,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557104502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:42,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854185294] [2021-07-09 17:39:42,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:42,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:42,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:42,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:42,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:43,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854185294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:43,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:43,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:43,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042463925] [2021-07-09 17:39:43,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:43,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:43,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:43,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:43,056 INFO L87 Difference]: Start difference. First operand 364 states and 1077 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:43,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:43,638 INFO L93 Difference]: Finished difference Result 666 states and 1909 transitions. [2021-07-09 17:39:43,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:39:43,638 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:43,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:43,639 INFO L225 Difference]: With dead ends: 666 [2021-07-09 17:39:43,639 INFO L226 Difference]: Without dead ends: 656 [2021-07-09 17:39:43,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 457.9ms TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:39:43,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-07-09 17:39:43,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 361. [2021-07-09 17:39:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.9583333333333335) internal successors, (1065), 360 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1065 transitions. [2021-07-09 17:39:43,644 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1065 transitions. Word has length 22 [2021-07-09 17:39:43,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:43,644 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 1065 transitions. [2021-07-09 17:39:43,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:43,644 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1065 transitions. [2021-07-09 17:39:43,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:43,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:43,645 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:43,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-07-09 17:39:43,861 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:43,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:43,861 INFO L82 PathProgramCache]: Analyzing trace with hash 732105636, now seen corresponding path program 156 times [2021-07-09 17:39:43,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:43,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449809521] [2021-07-09 17:39:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:43,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:43,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449809521] [2021-07-09 17:39:43,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449809521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:43,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042287606] [2021-07-09 17:39:43,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:43,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:39:43,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:43,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:43,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:44,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042287606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:44,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:44,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:44,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871380528] [2021-07-09 17:39:44,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:44,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:44,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:44,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:44,103 INFO L87 Difference]: Start difference. First operand 361 states and 1065 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:44,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:44,520 INFO L93 Difference]: Finished difference Result 652 states and 1887 transitions. [2021-07-09 17:39:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:39:44,520 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:44,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:44,521 INFO L225 Difference]: With dead ends: 652 [2021-07-09 17:39:44,521 INFO L226 Difference]: Without dead ends: 632 [2021-07-09 17:39:44,521 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 312.4ms TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:44,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-07-09 17:39:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 358. [2021-07-09 17:39:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.9495798319327733) internal successors, (1053), 357 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1053 transitions. [2021-07-09 17:39:44,526 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1053 transitions. Word has length 22 [2021-07-09 17:39:44,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:44,526 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 1053 transitions. [2021-07-09 17:39:44,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:44,527 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1053 transitions. [2021-07-09 17:39:44,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:44,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:44,527 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:44,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1676 [2021-07-09 17:39:44,743 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:44,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:44,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1791265100, now seen corresponding path program 157 times [2021-07-09 17:39:44,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:44,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857870759] [2021-07-09 17:39:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:44,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:44,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857870759] [2021-07-09 17:39:44,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857870759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:44,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088173356] [2021-07-09 17:39:44,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:44,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:44,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:44,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088173356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:44,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:44,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:44,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411113193] [2021-07-09 17:39:44,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:44,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:44,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:44,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:44,974 INFO L87 Difference]: Start difference. First operand 358 states and 1053 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:45,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:45,209 INFO L93 Difference]: Finished difference Result 580 states and 1679 transitions. [2021-07-09 17:39:45,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:45,209 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:45,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:45,210 INFO L225 Difference]: With dead ends: 580 [2021-07-09 17:39:45,210 INFO L226 Difference]: Without dead ends: 544 [2021-07-09 17:39:45,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:39:45,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-09 17:39:45,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 332. [2021-07-09 17:39:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9486404833836857) internal successors, (976), 331 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 976 transitions. [2021-07-09 17:39:45,214 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 976 transitions. Word has length 22 [2021-07-09 17:39:45,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:45,214 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 976 transitions. [2021-07-09 17:39:45,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:45,214 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 976 transitions. [2021-07-09 17:39:45,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:45,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:45,215 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:45,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1680,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:45,417 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:45,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:45,417 INFO L82 PathProgramCache]: Analyzing trace with hash 833708592, now seen corresponding path program 158 times [2021-07-09 17:39:45,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:45,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968541520] [2021-07-09 17:39:45,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:45,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:45,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968541520] [2021-07-09 17:39:45,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968541520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:45,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960903449] [2021-07-09 17:39:45,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:45,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:45,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:45,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:45,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:45,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960903449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:45,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:45,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:45,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596713215] [2021-07-09 17:39:45,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:45,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:45,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:45,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:45,662 INFO L87 Difference]: Start difference. First operand 332 states and 976 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:45,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:45,854 INFO L93 Difference]: Finished difference Result 529 states and 1547 transitions. [2021-07-09 17:39:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:39:45,854 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:45,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:45,855 INFO L225 Difference]: With dead ends: 529 [2021-07-09 17:39:45,855 INFO L226 Difference]: Without dead ends: 529 [2021-07-09 17:39:45,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:39:45,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-07-09 17:39:45,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 341. [2021-07-09 17:39:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9676470588235295) internal successors, (1009), 340 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1009 transitions. [2021-07-09 17:39:45,859 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1009 transitions. Word has length 22 [2021-07-09 17:39:45,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:45,859 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1009 transitions. [2021-07-09 17:39:45,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:45,859 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1009 transitions. [2021-07-09 17:39:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:45,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:45,860 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:46,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1684 [2021-07-09 17:39:46,075 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:46,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:46,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1966655740, now seen corresponding path program 159 times [2021-07-09 17:39:46,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:46,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882029] [2021-07-09 17:39:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:46,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:46,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882029] [2021-07-09 17:39:46,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:46,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171604676] [2021-07-09 17:39:46,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:46,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:39:46,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:46,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:46,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:46,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171604676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:46,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:46,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:46,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463040892] [2021-07-09 17:39:46,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:46,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:46,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:46,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:46,322 INFO L87 Difference]: Start difference. First operand 341 states and 1009 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:46,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:46,586 INFO L93 Difference]: Finished difference Result 560 states and 1626 transitions. [2021-07-09 17:39:46,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:46,587 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:46,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:46,587 INFO L225 Difference]: With dead ends: 560 [2021-07-09 17:39:46,587 INFO L226 Difference]: Without dead ends: 550 [2021-07-09 17:39:46,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:39:46,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-07-09 17:39:46,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 338. [2021-07-09 17:39:46,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9584569732937687) internal successors, (997), 337 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:46,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 997 transitions. [2021-07-09 17:39:46,592 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 997 transitions. Word has length 22 [2021-07-09 17:39:46,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:46,592 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 997 transitions. [2021-07-09 17:39:46,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:46,592 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 997 transitions. [2021-07-09 17:39:46,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:46,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:46,593 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:46,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1689 [2021-07-09 17:39:46,809 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:46,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1541708530, now seen corresponding path program 160 times [2021-07-09 17:39:46,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:46,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145395316] [2021-07-09 17:39:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:46,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:46,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145395316] [2021-07-09 17:39:46,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145395316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:46,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003258329] [2021-07-09 17:39:46,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:46,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:46,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:46,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:46,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:47,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003258329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:47,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:47,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:47,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108267376] [2021-07-09 17:39:47,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:47,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:47,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:47,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:47,072 INFO L87 Difference]: Start difference. First operand 338 states and 997 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:47,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:47,312 INFO L93 Difference]: Finished difference Result 511 states and 1498 transitions. [2021-07-09 17:39:47,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:47,312 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:47,313 INFO L225 Difference]: With dead ends: 511 [2021-07-09 17:39:47,313 INFO L226 Difference]: Without dead ends: 491 [2021-07-09 17:39:47,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:39:47,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-07-09 17:39:47,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 335. [2021-07-09 17:39:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9491017964071857) internal successors, (985), 334 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 985 transitions. [2021-07-09 17:39:47,317 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 985 transitions. Word has length 22 [2021-07-09 17:39:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:47,317 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 985 transitions. [2021-07-09 17:39:47,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:47,317 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 985 transitions. [2021-07-09 17:39:47,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:47,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:47,318 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:47,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1695,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:47,525 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:47,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:47,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1380787108, now seen corresponding path program 161 times [2021-07-09 17:39:47,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:47,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982397938] [2021-07-09 17:39:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:47,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:47,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982397938] [2021-07-09 17:39:47,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982397938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:47,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029578295] [2021-07-09 17:39:47,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:47,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:47,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:47,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:47,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:47,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029578295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:47,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:47,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:47,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696791437] [2021-07-09 17:39:47,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:47,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:47,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:47,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:47,794 INFO L87 Difference]: Start difference. First operand 335 states and 985 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:48,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:48,024 INFO L93 Difference]: Finished difference Result 621 states and 1797 transitions. [2021-07-09 17:39:48,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:39:48,025 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:48,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:48,026 INFO L225 Difference]: With dead ends: 621 [2021-07-09 17:39:48,026 INFO L226 Difference]: Without dead ends: 621 [2021-07-09 17:39:48,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:39:48,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-07-09 17:39:48,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 347. [2021-07-09 17:39:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.985549132947977) internal successors, (1033), 346 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1033 transitions. [2021-07-09 17:39:48,030 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1033 transitions. Word has length 22 [2021-07-09 17:39:48,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:48,030 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1033 transitions. [2021-07-09 17:39:48,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:48,031 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1033 transitions. [2021-07-09 17:39:48,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:48,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:48,031 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:48,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-07-09 17:39:48,245 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:48,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:48,245 INFO L82 PathProgramCache]: Analyzing trace with hash 113815856, now seen corresponding path program 162 times [2021-07-09 17:39:48,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:48,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138552310] [2021-07-09 17:39:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:48,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:48,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138552310] [2021-07-09 17:39:48,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138552310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:48,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550801975] [2021-07-09 17:39:48,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:48,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:48,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:48,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:48,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:48,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550801975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:48,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:48,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:48,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658157849] [2021-07-09 17:39:48,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:48,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:48,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:48,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:48,475 INFO L87 Difference]: Start difference. First operand 347 states and 1033 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:48,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:48,796 INFO L93 Difference]: Finished difference Result 584 states and 1702 transitions. [2021-07-09 17:39:48,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:48,797 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:48,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:48,797 INFO L225 Difference]: With dead ends: 584 [2021-07-09 17:39:48,798 INFO L226 Difference]: Without dead ends: 574 [2021-07-09 17:39:48,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-07-09 17:39:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 354. [2021-07-09 17:39:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.9660056657223794) internal successors, (1047), 353 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:48,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1047 transitions. [2021-07-09 17:39:48,802 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1047 transitions. Word has length 22 [2021-07-09 17:39:48,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:48,802 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1047 transitions. [2021-07-09 17:39:48,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:48,802 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1047 transitions. [2021-07-09 17:39:48,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:48,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:48,803 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:49,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1704 [2021-07-09 17:39:49,019 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:49,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:49,019 INFO L82 PathProgramCache]: Analyzing trace with hash -205296464, now seen corresponding path program 163 times [2021-07-09 17:39:49,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:49,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084649314] [2021-07-09 17:39:49,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:49,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:49,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084649314] [2021-07-09 17:39:49,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084649314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:49,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224398636] [2021-07-09 17:39:49,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:49,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:49,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:49,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224398636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:49,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:49,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:49,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210507354] [2021-07-09 17:39:49,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:49,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:49,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:49,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:49,267 INFO L87 Difference]: Start difference. First operand 354 states and 1047 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:49,419 INFO L93 Difference]: Finished difference Result 488 states and 1444 transitions. [2021-07-09 17:39:49,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:39:49,419 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:49,420 INFO L225 Difference]: With dead ends: 488 [2021-07-09 17:39:49,420 INFO L226 Difference]: Without dead ends: 488 [2021-07-09 17:39:49,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:39:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-07-09 17:39:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 326. [2021-07-09 17:39:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9476923076923076) internal successors, (958), 325 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:49,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 958 transitions. [2021-07-09 17:39:49,424 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 958 transitions. Word has length 22 [2021-07-09 17:39:49,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:49,424 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 958 transitions. [2021-07-09 17:39:49,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:49,424 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 958 transitions. [2021-07-09 17:39:49,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:49,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:49,425 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:49,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-07-09 17:39:49,641 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:49,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1399002178, now seen corresponding path program 164 times [2021-07-09 17:39:49,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:49,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470766071] [2021-07-09 17:39:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:49,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:49,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470766071] [2021-07-09 17:39:49,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470766071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:49,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922570686] [2021-07-09 17:39:49,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:49,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:49,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:49,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:49,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:49,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922570686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:49,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:49,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:49,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927091905] [2021-07-09 17:39:49,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:49,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:49,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:49,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:49,945 INFO L87 Difference]: Start difference. First operand 326 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:50,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:50,183 INFO L93 Difference]: Finished difference Result 508 states and 1483 transitions. [2021-07-09 17:39:50,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:39:50,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:50,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:50,184 INFO L225 Difference]: With dead ends: 508 [2021-07-09 17:39:50,184 INFO L226 Difference]: Without dead ends: 508 [2021-07-09 17:39:50,184 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:39:50,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-07-09 17:39:50,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 336. [2021-07-09 17:39:50,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.97910447761194) internal successors, (998), 335 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 998 transitions. [2021-07-09 17:39:50,188 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 998 transitions. Word has length 22 [2021-07-09 17:39:50,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:50,188 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 998 transitions. [2021-07-09 17:39:50,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:50,188 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 998 transitions. [2021-07-09 17:39:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:50,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:50,189 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:50,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1712,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:50,404 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:50,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1401362154, now seen corresponding path program 165 times [2021-07-09 17:39:50,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:50,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283277733] [2021-07-09 17:39:50,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:50,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:50,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283277733] [2021-07-09 17:39:50,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283277733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:50,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125788499] [2021-07-09 17:39:50,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:50,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:39:50,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:50,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:50,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:50,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125788499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:50,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:50,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:50,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022902326] [2021-07-09 17:39:50,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:50,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:50,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:50,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:50,740 INFO L87 Difference]: Start difference. First operand 336 states and 998 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:51,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:51,103 INFO L93 Difference]: Finished difference Result 539 states and 1562 transitions. [2021-07-09 17:39:51,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:51,103 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:51,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:51,104 INFO L225 Difference]: With dead ends: 539 [2021-07-09 17:39:51,104 INFO L226 Difference]: Without dead ends: 529 [2021-07-09 17:39:51,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 342.0ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:51,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-07-09 17:39:51,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 333. [2021-07-09 17:39:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9698795180722892) internal successors, (986), 332 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 986 transitions. [2021-07-09 17:39:51,108 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 986 transitions. Word has length 22 [2021-07-09 17:39:51,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:51,108 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 986 transitions. [2021-07-09 17:39:51,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:51,109 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 986 transitions. [2021-07-09 17:39:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:51,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:51,109 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:51,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1721 [2021-07-09 17:39:51,325 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:51,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:51,325 INFO L82 PathProgramCache]: Analyzing trace with hash -976414944, now seen corresponding path program 166 times [2021-07-09 17:39:51,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:51,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115677424] [2021-07-09 17:39:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:51,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:51,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115677424] [2021-07-09 17:39:51,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115677424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:51,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584499563] [2021-07-09 17:39:51,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:51,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:51,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:51,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:51,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:51,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584499563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:51,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:51,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:51,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311506203] [2021-07-09 17:39:51,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:51,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:51,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:51,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:51,614 INFO L87 Difference]: Start difference. First operand 333 states and 986 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:51,923 INFO L93 Difference]: Finished difference Result 500 states and 1460 transitions. [2021-07-09 17:39:51,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:51,923 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:51,924 INFO L225 Difference]: With dead ends: 500 [2021-07-09 17:39:51,924 INFO L226 Difference]: Without dead ends: 480 [2021-07-09 17:39:51,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 302.4ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:39:51,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-07-09 17:39:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 330. [2021-07-09 17:39:51,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9604863221884496) internal successors, (974), 329 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:51,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 974 transitions. [2021-07-09 17:39:51,928 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 974 transitions. Word has length 22 [2021-07-09 17:39:51,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:51,929 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 974 transitions. [2021-07-09 17:39:51,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:51,929 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 974 transitions. [2021-07-09 17:39:51,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:51,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:51,929 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:52,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1730,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:52,146 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:52,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:52,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1791095814, now seen corresponding path program 167 times [2021-07-09 17:39:52,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:52,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293043580] [2021-07-09 17:39:52,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:52,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:52,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293043580] [2021-07-09 17:39:52,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293043580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:52,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669052966] [2021-07-09 17:39:52,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:52,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:52,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:52,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:52,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:52,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669052966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:52,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:52,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:52,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098331986] [2021-07-09 17:39:52,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:52,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:52,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:52,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:52,525 INFO L87 Difference]: Start difference. First operand 330 states and 974 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:52,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:52,853 INFO L93 Difference]: Finished difference Result 626 states and 1819 transitions. [2021-07-09 17:39:52,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:39:52,853 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:52,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:52,854 INFO L225 Difference]: With dead ends: 626 [2021-07-09 17:39:52,854 INFO L226 Difference]: Without dead ends: 626 [2021-07-09 17:39:52,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 333.5ms TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:52,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-07-09 17:39:52,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 340. [2021-07-09 17:39:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0117994100294987) internal successors, (1021), 339 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1021 transitions. [2021-07-09 17:39:52,859 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1021 transitions. Word has length 22 [2021-07-09 17:39:52,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:52,859 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1021 transitions. [2021-07-09 17:39:52,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1021 transitions. [2021-07-09 17:39:52,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:52,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:52,859 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:53,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1739,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:53,076 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:53,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:53,076 INFO L82 PathProgramCache]: Analyzing trace with hash -296492850, now seen corresponding path program 168 times [2021-07-09 17:39:53,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:53,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571088323] [2021-07-09 17:39:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:53,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:53,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571088323] [2021-07-09 17:39:53,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571088323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:53,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079383641] [2021-07-09 17:39:53,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:53,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:39:53,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:53,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:53,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:53,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079383641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:53,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:53,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:53,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705068586] [2021-07-09 17:39:53,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:53,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:53,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:53,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:53,369 INFO L87 Difference]: Start difference. First operand 340 states and 1021 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:53,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:53,797 INFO L93 Difference]: Finished difference Result 668 states and 1921 transitions. [2021-07-09 17:39:53,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:39:53,797 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:53,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:53,798 INFO L225 Difference]: With dead ends: 668 [2021-07-09 17:39:53,798 INFO L226 Difference]: Without dead ends: 658 [2021-07-09 17:39:53,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 414.2ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:39:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-07-09 17:39:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 347. [2021-07-09 17:39:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.991329479768786) internal successors, (1035), 346 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1035 transitions. [2021-07-09 17:39:53,803 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1035 transitions. Word has length 22 [2021-07-09 17:39:53,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:53,803 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1035 transitions. [2021-07-09 17:39:53,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:53,803 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1035 transitions. [2021-07-09 17:39:53,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:53,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:53,804 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:54,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1750 [2021-07-09 17:39:54,020 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:54,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:54,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1154039106, now seen corresponding path program 169 times [2021-07-09 17:39:54,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:54,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473734956] [2021-07-09 17:39:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:54,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:54,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473734956] [2021-07-09 17:39:54,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473734956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:54,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143386630] [2021-07-09 17:39:54,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:54,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:54,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:54,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143386630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:54,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:54,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:54,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003144198] [2021-07-09 17:39:54,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:54,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:54,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:54,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:54,346 INFO L87 Difference]: Start difference. First operand 347 states and 1035 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:54,560 INFO L93 Difference]: Finished difference Result 559 states and 1628 transitions. [2021-07-09 17:39:54,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:39:54,560 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:54,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:54,561 INFO L225 Difference]: With dead ends: 559 [2021-07-09 17:39:54,561 INFO L226 Difference]: Without dead ends: 559 [2021-07-09 17:39:54,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:39:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-09 17:39:54,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 338. [2021-07-09 17:39:54,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9970326409495547) internal successors, (1010), 337 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:54,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1010 transitions. [2021-07-09 17:39:54,566 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1010 transitions. Word has length 22 [2021-07-09 17:39:54,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:54,566 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1010 transitions. [2021-07-09 17:39:54,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1010 transitions. [2021-07-09 17:39:54,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:54,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:54,566 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:54,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-07-09 17:39:54,783 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:54,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:54,783 INFO L82 PathProgramCache]: Analyzing trace with hash -357980338, now seen corresponding path program 170 times [2021-07-09 17:39:54,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:54,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660394559] [2021-07-09 17:39:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:54,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:54,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660394559] [2021-07-09 17:39:54,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660394559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:54,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857719184] [2021-07-09 17:39:54,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:54,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:54,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:54,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:54,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:55,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857719184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:55,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:55,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:55,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234993568] [2021-07-09 17:39:55,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:55,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:55,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:55,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:55,099 INFO L87 Difference]: Start difference. First operand 338 states and 1010 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:55,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:55,292 INFO L93 Difference]: Finished difference Result 550 states and 1580 transitions. [2021-07-09 17:39:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:39:55,292 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:55,293 INFO L225 Difference]: With dead ends: 550 [2021-07-09 17:39:55,293 INFO L226 Difference]: Without dead ends: 541 [2021-07-09 17:39:55,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:39:55,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-07-09 17:39:55,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 344. [2021-07-09 17:39:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.979591836734694) internal successors, (1022), 343 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:55,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1022 transitions. [2021-07-09 17:39:55,297 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1022 transitions. Word has length 22 [2021-07-09 17:39:55,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:55,297 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1022 transitions. [2021-07-09 17:39:55,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:55,297 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1022 transitions. [2021-07-09 17:39:55,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:55,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:55,298 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:55,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1773,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:55,513 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash -580540704, now seen corresponding path program 171 times [2021-07-09 17:39:55,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:55,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245650010] [2021-07-09 17:39:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:55,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:55,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245650010] [2021-07-09 17:39:55,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245650010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:55,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555144307] [2021-07-09 17:39:55,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:55,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:39:55,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:55,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:55,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:55,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555144307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:55,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:55,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:55,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885783220] [2021-07-09 17:39:55,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:55,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:55,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:55,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:55,767 INFO L87 Difference]: Start difference. First operand 344 states and 1022 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:56,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:56,142 INFO L93 Difference]: Finished difference Result 617 states and 1746 transitions. [2021-07-09 17:39:56,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:39:56,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:56,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:56,143 INFO L225 Difference]: With dead ends: 617 [2021-07-09 17:39:56,143 INFO L226 Difference]: Without dead ends: 607 [2021-07-09 17:39:56,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 335.5ms TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-07-09 17:39:56,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 366. [2021-07-09 17:39:56,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9753424657534246) internal successors, (1086), 365 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1086 transitions. [2021-07-09 17:39:56,148 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1086 transitions. Word has length 22 [2021-07-09 17:39:56,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:56,148 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1086 transitions. [2021-07-09 17:39:56,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:56,149 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1086 transitions. [2021-07-09 17:39:56,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:56,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:56,149 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:56,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1783 [2021-07-09 17:39:56,365 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:56,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:56,365 INFO L82 PathProgramCache]: Analyzing trace with hash -762631016, now seen corresponding path program 172 times [2021-07-09 17:39:56,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:56,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056560273] [2021-07-09 17:39:56,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:56,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:56,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056560273] [2021-07-09 17:39:56,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056560273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:56,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214273688] [2021-07-09 17:39:56,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:56,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:39:56,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:56,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:56,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:56,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214273688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:56,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:56,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:56,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095495707] [2021-07-09 17:39:56,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:56,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:56,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:56,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:56,612 INFO L87 Difference]: Start difference. First operand 366 states and 1086 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:56,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:56,907 INFO L93 Difference]: Finished difference Result 607 states and 1707 transitions. [2021-07-09 17:39:56,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:39:56,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:56,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:56,908 INFO L225 Difference]: With dead ends: 607 [2021-07-09 17:39:56,908 INFO L226 Difference]: Without dead ends: 595 [2021-07-09 17:39:56,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:39:56,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-07-09 17:39:56,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 346. [2021-07-09 17:39:56,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.973913043478261) internal successors, (1026), 345 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1026 transitions. [2021-07-09 17:39:56,912 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1026 transitions. Word has length 22 [2021-07-09 17:39:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:56,913 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1026 transitions. [2021-07-09 17:39:56,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1026 transitions. [2021-07-09 17:39:56,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:56,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:56,913 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:57,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1795 [2021-07-09 17:39:57,129 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:57,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:57,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1191963826, now seen corresponding path program 173 times [2021-07-09 17:39:57,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:57,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885963126] [2021-07-09 17:39:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:57,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:57,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885963126] [2021-07-09 17:39:57,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885963126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:57,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724946965] [2021-07-09 17:39:57,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:57,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:39:57,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:57,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:57,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:57,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724946965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:57,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:57,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:57,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913314980] [2021-07-09 17:39:57,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:57,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:57,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:57,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:57,425 INFO L87 Difference]: Start difference. First operand 346 states and 1026 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:57,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:57,753 INFO L93 Difference]: Finished difference Result 475 states and 1390 transitions. [2021-07-09 17:39:57,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:57,753 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:57,754 INFO L225 Difference]: With dead ends: 475 [2021-07-09 17:39:57,754 INFO L226 Difference]: Without dead ends: 455 [2021-07-09 17:39:57,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:39:57,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-07-09 17:39:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 352. [2021-07-09 17:39:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.96011396011396) internal successors, (1039), 351 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1039 transitions. [2021-07-09 17:39:57,758 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1039 transitions. Word has length 22 [2021-07-09 17:39:57,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:57,758 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1039 transitions. [2021-07-09 17:39:57,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1039 transitions. [2021-07-09 17:39:57,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:57,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:57,759 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:57,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-07-09 17:39:57,975 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:57,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1753171094, now seen corresponding path program 174 times [2021-07-09 17:39:57,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:57,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113572607] [2021-07-09 17:39:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:58,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:58,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113572607] [2021-07-09 17:39:58,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113572607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:58,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781306241] [2021-07-09 17:39:58,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:58,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:39:58,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:58,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:58,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:58,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781306241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:58,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:58,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:58,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322930898] [2021-07-09 17:39:58,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:58,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:58,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:58,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:58,272 INFO L87 Difference]: Start difference. First operand 352 states and 1039 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:58,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:58,668 INFO L93 Difference]: Finished difference Result 553 states and 1568 transitions. [2021-07-09 17:39:58,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:39:58,668 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:58,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:58,669 INFO L225 Difference]: With dead ends: 553 [2021-07-09 17:39:58,669 INFO L226 Difference]: Without dead ends: 543 [2021-07-09 17:39:58,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 342.6ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:39:58,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-07-09 17:39:58,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 374. [2021-07-09 17:39:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.9571045576407506) internal successors, (1103), 373 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1103 transitions. [2021-07-09 17:39:58,686 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1103 transitions. Word has length 22 [2021-07-09 17:39:58,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:58,687 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1103 transitions. [2021-07-09 17:39:58,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:58,687 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1103 transitions. [2021-07-09 17:39:58,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:58,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:58,687 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:58,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1816,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:58,901 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:58,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:58,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1571080782, now seen corresponding path program 175 times [2021-07-09 17:39:58,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:58,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353581552] [2021-07-09 17:39:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:58,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:58,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353581552] [2021-07-09 17:39:58,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353581552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:58,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150641414] [2021-07-09 17:39:58,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:59,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:59,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:59,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150641414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:59,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:59,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:39:59,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989941966] [2021-07-09 17:39:59,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:39:59,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:59,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:39:59,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:39:59,200 INFO L87 Difference]: Start difference. First operand 374 states and 1103 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:59,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:39:59,469 INFO L93 Difference]: Finished difference Result 510 states and 1457 transitions. [2021-07-09 17:39:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:39:59,469 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:39:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:39:59,470 INFO L225 Difference]: With dead ends: 510 [2021-07-09 17:39:59,470 INFO L226 Difference]: Without dead ends: 495 [2021-07-09 17:39:59,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 266.2ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:39:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-09 17:39:59,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 348. [2021-07-09 17:39:59,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.968299711815562) internal successors, (1030), 347 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1030 transitions. [2021-07-09 17:39:59,475 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1030 transitions. Word has length 22 [2021-07-09 17:39:59,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:39:59,475 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1030 transitions. [2021-07-09 17:39:59,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:39:59,475 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1030 transitions. [2021-07-09 17:39:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:39:59,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:39:59,475 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:39:59,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1827,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:59,691 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:39:59,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:39:59,692 INFO L82 PathProgramCache]: Analyzing trace with hash 861509322, now seen corresponding path program 176 times [2021-07-09 17:39:59,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:39:59,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056876979] [2021-07-09 17:39:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:39:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:39:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:59,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:39:59,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056876979] [2021-07-09 17:39:59,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056876979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:59,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904640780] [2021-07-09 17:39:59,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:39:59,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:39:59,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:39:59,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:39:59,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:39:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:39:59,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904640780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:39:59,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:39:59,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:39:59,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354837849] [2021-07-09 17:39:59,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:39:59,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:39:59,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:39:59,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:39:59,970 INFO L87 Difference]: Start difference. First operand 348 states and 1030 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:00,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:00,157 INFO L93 Difference]: Finished difference Result 491 states and 1418 transitions. [2021-07-09 17:40:00,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:40:00,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:00,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:00,158 INFO L225 Difference]: With dead ends: 491 [2021-07-09 17:40:00,158 INFO L226 Difference]: Without dead ends: 491 [2021-07-09 17:40:00,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:40:00,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-07-09 17:40:00,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 351. [2021-07-09 17:40:00,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.954285714285714) internal successors, (1034), 350 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1034 transitions. [2021-07-09 17:40:00,163 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1034 transitions. Word has length 22 [2021-07-09 17:40:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:00,163 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1034 transitions. [2021-07-09 17:40:00,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:00,163 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1034 transitions. [2021-07-09 17:40:00,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:00,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:00,163 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:00,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1838,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:00,380 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:00,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1938855010, now seen corresponding path program 177 times [2021-07-09 17:40:00,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:00,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394877887] [2021-07-09 17:40:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:00,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:00,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394877887] [2021-07-09 17:40:00,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394877887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:00,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136695239] [2021-07-09 17:40:00,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:00,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:40:00,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:00,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:00,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:00,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136695239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:00,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:00,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:00,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296021363] [2021-07-09 17:40:00,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:00,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:00,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:00,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:00,654 INFO L87 Difference]: Start difference. First operand 351 states and 1034 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:00,976 INFO L93 Difference]: Finished difference Result 522 states and 1494 transitions. [2021-07-09 17:40:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:40:00,977 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:00,978 INFO L225 Difference]: With dead ends: 522 [2021-07-09 17:40:00,978 INFO L226 Difference]: Without dead ends: 512 [2021-07-09 17:40:00,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:40:00,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-07-09 17:40:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 348. [2021-07-09 17:40:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.9452449567723344) internal successors, (1022), 347 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1022 transitions. [2021-07-09 17:40:00,982 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1022 transitions. Word has length 22 [2021-07-09 17:40:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:00,982 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1022 transitions. [2021-07-09 17:40:00,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:00,982 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1022 transitions. [2021-07-09 17:40:00,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:00,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:00,983 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:01,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1843,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:01,199 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:01,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:01,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1513907800, now seen corresponding path program 178 times [2021-07-09 17:40:01,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:01,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138664950] [2021-07-09 17:40:01,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:01,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:01,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138664950] [2021-07-09 17:40:01,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138664950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:01,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997355554] [2021-07-09 17:40:01,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:01,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:01,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:01,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:01,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:01,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997355554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:01,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:01,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:01,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53293411] [2021-07-09 17:40:01,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:01,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:01,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:01,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:01,454 INFO L87 Difference]: Start difference. First operand 348 states and 1022 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:01,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:01,725 INFO L93 Difference]: Finished difference Result 473 states and 1378 transitions. [2021-07-09 17:40:01,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:40:01,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:01,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:01,726 INFO L225 Difference]: With dead ends: 473 [2021-07-09 17:40:01,726 INFO L226 Difference]: Without dead ends: 453 [2021-07-09 17:40:01,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:40:01,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-07-09 17:40:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 330. [2021-07-09 17:40:01,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9483282674772036) internal successors, (970), 329 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 970 transitions. [2021-07-09 17:40:01,730 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 970 transitions. Word has length 22 [2021-07-09 17:40:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:01,730 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 970 transitions. [2021-07-09 17:40:01,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:01,730 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 970 transitions. [2021-07-09 17:40:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:01,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:01,731 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:01,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1848,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:01,947 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:01,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:01,948 INFO L82 PathProgramCache]: Analyzing trace with hash 193085434, now seen corresponding path program 179 times [2021-07-09 17:40:01,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:01,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349611298] [2021-07-09 17:40:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:02,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:02,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349611298] [2021-07-09 17:40:02,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349611298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:02,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106272020] [2021-07-09 17:40:02,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:02,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:02,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:02,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:02,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:02,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106272020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:02,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:02,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:02,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747393587] [2021-07-09 17:40:02,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:02,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:02,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:02,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:02,220 INFO L87 Difference]: Start difference. First operand 330 states and 970 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:02,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:02,411 INFO L93 Difference]: Finished difference Result 550 states and 1602 transitions. [2021-07-09 17:40:02,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:40:02,412 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:02,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:02,412 INFO L225 Difference]: With dead ends: 550 [2021-07-09 17:40:02,413 INFO L226 Difference]: Without dead ends: 550 [2021-07-09 17:40:02,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:40:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-07-09 17:40:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 342. [2021-07-09 17:40:02,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9853372434017595) internal successors, (1018), 341 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1018 transitions. [2021-07-09 17:40:02,417 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1018 transitions. Word has length 22 [2021-07-09 17:40:02,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:02,417 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1018 transitions. [2021-07-09 17:40:02,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:02,417 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1018 transitions. [2021-07-09 17:40:02,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:02,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:02,418 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:02,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1852 [2021-07-09 17:40:02,627 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:02,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:02,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1687688398, now seen corresponding path program 180 times [2021-07-09 17:40:02,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:02,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557501572] [2021-07-09 17:40:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:02,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:02,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557501572] [2021-07-09 17:40:02,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557501572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:02,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800295067] [2021-07-09 17:40:02,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:02,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:40:02,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:02,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:02,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:02,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800295067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:02,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:02,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:02,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640542257] [2021-07-09 17:40:02,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:02,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:02,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:02,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:02,891 INFO L87 Difference]: Start difference. First operand 342 states and 1018 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:03,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:03,266 INFO L93 Difference]: Finished difference Result 542 states and 1576 transitions. [2021-07-09 17:40:03,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:40:03,266 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:03,267 INFO L225 Difference]: With dead ends: 542 [2021-07-09 17:40:03,267 INFO L226 Difference]: Without dead ends: 532 [2021-07-09 17:40:03,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 312.2ms TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:03,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-07-09 17:40:03,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 349. [2021-07-09 17:40:03,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.9655172413793105) internal successors, (1032), 348 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1032 transitions. [2021-07-09 17:40:03,272 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1032 transitions. Word has length 22 [2021-07-09 17:40:03,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:03,272 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1032 transitions. [2021-07-09 17:40:03,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:03,272 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1032 transitions. [2021-07-09 17:40:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:03,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:03,272 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:03,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1857,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:03,488 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:03,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1368576078, now seen corresponding path program 181 times [2021-07-09 17:40:03,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:03,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865745687] [2021-07-09 17:40:03,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:03,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:03,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865745687] [2021-07-09 17:40:03,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865745687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:03,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924149234] [2021-07-09 17:40:03,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:03,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:03,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:03,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924149234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:03,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:03,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:40:03,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956415865] [2021-07-09 17:40:03,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:40:03,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:03,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:40:03,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:40:03,739 INFO L87 Difference]: Start difference. First operand 349 states and 1032 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:03,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:03,930 INFO L93 Difference]: Finished difference Result 450 states and 1330 transitions. [2021-07-09 17:40:03,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:40:03,930 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:03,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:03,931 INFO L225 Difference]: With dead ends: 450 [2021-07-09 17:40:03,931 INFO L226 Difference]: Without dead ends: 450 [2021-07-09 17:40:03,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:40:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-07-09 17:40:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 327. [2021-07-09 17:40:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9478527607361964) internal successors, (961), 326 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 961 transitions. [2021-07-09 17:40:03,935 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 961 transitions. Word has length 22 [2021-07-09 17:40:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:03,935 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 961 transitions. [2021-07-09 17:40:03,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 961 transitions. [2021-07-09 17:40:03,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:03,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:03,935 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:04,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1863 [2021-07-09 17:40:04,145 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:04,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:04,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1160139342, now seen corresponding path program 182 times [2021-07-09 17:40:04,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:04,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391227109] [2021-07-09 17:40:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:04,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:04,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391227109] [2021-07-09 17:40:04,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391227109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:04,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532706582] [2021-07-09 17:40:04,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:04,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:04,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:04,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:04,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:04,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532706582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:04,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:04,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:04,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476997482] [2021-07-09 17:40:04,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:04,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:04,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:04,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:04,424 INFO L87 Difference]: Start difference. First operand 327 states and 961 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:04,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:04,676 INFO L93 Difference]: Finished difference Result 707 states and 2023 transitions. [2021-07-09 17:40:04,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:40:04,677 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:04,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:04,678 INFO L225 Difference]: With dead ends: 707 [2021-07-09 17:40:04,678 INFO L226 Difference]: Without dead ends: 707 [2021-07-09 17:40:04,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 260.3ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:40:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-07-09 17:40:04,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 341. [2021-07-09 17:40:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.011764705882353) internal successors, (1024), 340 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1024 transitions. [2021-07-09 17:40:04,683 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1024 transitions. Word has length 22 [2021-07-09 17:40:04,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:04,683 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1024 transitions. [2021-07-09 17:40:04,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:04,683 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1024 transitions. [2021-07-09 17:40:04,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:04,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:04,684 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:04,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1866,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:04,900 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:04,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:04,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1640224990, now seen corresponding path program 183 times [2021-07-09 17:40:04,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:04,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154975026] [2021-07-09 17:40:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:04,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:04,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154975026] [2021-07-09 17:40:04,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154975026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:04,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860217656] [2021-07-09 17:40:04,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:05,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:40:05,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:05,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:05,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:05,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860217656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:05,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:05,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:05,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349112801] [2021-07-09 17:40:05,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:05,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:05,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:05,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:05,211 INFO L87 Difference]: Start difference. First operand 341 states and 1024 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:05,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:05,474 INFO L93 Difference]: Finished difference Result 650 states and 1868 transitions. [2021-07-09 17:40:05,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:40:05,474 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:05,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:05,475 INFO L225 Difference]: With dead ends: 650 [2021-07-09 17:40:05,475 INFO L226 Difference]: Without dead ends: 640 [2021-07-09 17:40:05,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 219.9ms TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:40:05,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-07-09 17:40:05,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 348. [2021-07-09 17:40:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.9913544668587897) internal successors, (1038), 347 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:05,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1038 transitions. [2021-07-09 17:40:05,480 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1038 transitions. Word has length 22 [2021-07-09 17:40:05,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:05,480 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1038 transitions. [2021-07-09 17:40:05,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:05,480 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1038 transitions. [2021-07-09 17:40:05,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:05,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:05,481 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:05,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1877 [2021-07-09 17:40:05,689 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:05,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:05,689 INFO L82 PathProgramCache]: Analyzing trace with hash -189693034, now seen corresponding path program 184 times [2021-07-09 17:40:05,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:05,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952420342] [2021-07-09 17:40:05,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:05,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:05,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952420342] [2021-07-09 17:40:05,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952420342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:05,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543723102] [2021-07-09 17:40:05,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:05,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:05,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:05,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:05,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:05,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543723102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:05,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:05,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:05,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424597552] [2021-07-09 17:40:05,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:05,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:05,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:05,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:05,995 INFO L87 Difference]: Start difference. First operand 348 states and 1038 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:06,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:06,180 INFO L93 Difference]: Finished difference Result 640 states and 1865 transitions. [2021-07-09 17:40:06,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:40:06,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:06,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:06,181 INFO L225 Difference]: With dead ends: 640 [2021-07-09 17:40:06,181 INFO L226 Difference]: Without dead ends: 640 [2021-07-09 17:40:06,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:40:06,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-07-09 17:40:06,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 354. [2021-07-09 17:40:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.0169971671388103) internal successors, (1065), 353 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:06,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1065 transitions. [2021-07-09 17:40:06,186 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1065 transitions. Word has length 22 [2021-07-09 17:40:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:06,186 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1065 transitions. [2021-07-09 17:40:06,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1065 transitions. [2021-07-09 17:40:06,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:06,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:06,187 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:06,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1889,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:06,403 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:06,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:06,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1701712478, now seen corresponding path program 185 times [2021-07-09 17:40:06,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:06,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74300659] [2021-07-09 17:40:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:06,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:06,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74300659] [2021-07-09 17:40:06,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74300659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:06,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506688107] [2021-07-09 17:40:06,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:06,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:40:06,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:06,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:06,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:06,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506688107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:06,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:06,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:06,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663192769] [2021-07-09 17:40:06,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:06,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:06,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:06,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:06,689 INFO L87 Difference]: Start difference. First operand 354 states and 1065 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:06,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:06,965 INFO L93 Difference]: Finished difference Result 631 states and 1817 transitions. [2021-07-09 17:40:06,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:40:06,965 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:06,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:06,966 INFO L225 Difference]: With dead ends: 631 [2021-07-09 17:40:06,966 INFO L226 Difference]: Without dead ends: 622 [2021-07-09 17:40:06,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:40:06,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-07-09 17:40:06,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 360. [2021-07-09 17:40:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.0) internal successors, (1077), 359 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1077 transitions. [2021-07-09 17:40:06,971 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1077 transitions. Word has length 22 [2021-07-09 17:40:06,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:06,971 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1077 transitions. [2021-07-09 17:40:06,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:06,971 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1077 transitions. [2021-07-09 17:40:06,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:06,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:06,972 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:07,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1898,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:07,188 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:07,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:07,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1924272844, now seen corresponding path program 186 times [2021-07-09 17:40:07,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:07,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649988777] [2021-07-09 17:40:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:07,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:07,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649988777] [2021-07-09 17:40:07,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649988777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:07,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632755556] [2021-07-09 17:40:07,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:07,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:40:07,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:07,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:07,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:07,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632755556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:07,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:07,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:40:07,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643650709] [2021-07-09 17:40:07,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:40:07,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:07,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:40:07,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:40:07,452 INFO L87 Difference]: Start difference. First operand 360 states and 1077 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:07,720 INFO L93 Difference]: Finished difference Result 593 states and 1708 transitions. [2021-07-09 17:40:07,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:40:07,721 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:07,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:07,722 INFO L225 Difference]: With dead ends: 593 [2021-07-09 17:40:07,722 INFO L226 Difference]: Without dead ends: 583 [2021-07-09 17:40:07,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:40:07,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-07-09 17:40:07,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 372. [2021-07-09 17:40:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.0053908355795147) internal successors, (1115), 371 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:07,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1115 transitions. [2021-07-09 17:40:07,733 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1115 transitions. Word has length 22 [2021-07-09 17:40:07,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:07,733 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1115 transitions. [2021-07-09 17:40:07,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:07,733 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1115 transitions. [2021-07-09 17:40:07,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:07,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:07,734 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:07,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1912,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:07,950 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:07,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:07,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2106363156, now seen corresponding path program 187 times [2021-07-09 17:40:07,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:07,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702081325] [2021-07-09 17:40:07,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:08,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:08,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702081325] [2021-07-09 17:40:08,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702081325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:08,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352586146] [2021-07-09 17:40:08,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:08,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:08,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:08,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352586146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:08,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:08,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:40:08,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430795934] [2021-07-09 17:40:08,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:40:08,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:08,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:40:08,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:40:08,228 INFO L87 Difference]: Start difference. First operand 372 states and 1115 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:08,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:08,469 INFO L93 Difference]: Finished difference Result 624 states and 1771 transitions. [2021-07-09 17:40:08,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:40:08,469 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:08,470 INFO L225 Difference]: With dead ends: 624 [2021-07-09 17:40:08,470 INFO L226 Difference]: Without dead ends: 612 [2021-07-09 17:40:08,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:40:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-07-09 17:40:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 368. [2021-07-09 17:40:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.005449591280654) internal successors, (1103), 367 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1103 transitions. [2021-07-09 17:40:08,475 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1103 transitions. Word has length 22 [2021-07-09 17:40:08,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:08,475 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1103 transitions. [2021-07-09 17:40:08,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:08,475 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1103 transitions. [2021-07-09 17:40:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:08,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:08,476 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:08,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1925,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:08,691 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:08,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:08,692 INFO L82 PathProgramCache]: Analyzing trace with hash 311516870, now seen corresponding path program 188 times [2021-07-09 17:40:08,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:08,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060791314] [2021-07-09 17:40:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:08,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:08,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060791314] [2021-07-09 17:40:08,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060791314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:08,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405190078] [2021-07-09 17:40:08,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:08,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:08,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:08,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:08,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:08,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405190078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:08,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:08,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:08,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515891315] [2021-07-09 17:40:08,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:08,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:08,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:08,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:08,955 INFO L87 Difference]: Start difference. First operand 368 states and 1103 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:09,209 INFO L93 Difference]: Finished difference Result 590 states and 1715 transitions. [2021-07-09 17:40:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:40:09,209 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:09,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:09,210 INFO L225 Difference]: With dead ends: 590 [2021-07-09 17:40:09,210 INFO L226 Difference]: Without dead ends: 590 [2021-07-09 17:40:09,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:40:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-07-09 17:40:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 373. [2021-07-09 17:40:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.0) internal successors, (1116), 372 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1116 transitions. [2021-07-09 17:40:09,215 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1116 transitions. Word has length 22 [2021-07-09 17:40:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:09,215 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 1116 transitions. [2021-07-09 17:40:09,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1116 transitions. [2021-07-09 17:40:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:09,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:09,216 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:09,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1936 [2021-07-09 17:40:09,420 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:09,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:09,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1806119834, now seen corresponding path program 189 times [2021-07-09 17:40:09,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:09,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069826826] [2021-07-09 17:40:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:09,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:09,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069826826] [2021-07-09 17:40:09,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069826826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:09,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767285957] [2021-07-09 17:40:09,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:09,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:40:09,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:09,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:09,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:09,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767285957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:09,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:09,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:09,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045185277] [2021-07-09 17:40:09,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:09,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:09,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:09,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:09,689 INFO L87 Difference]: Start difference. First operand 373 states and 1116 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:09,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:09,983 INFO L93 Difference]: Finished difference Result 566 states and 1650 transitions. [2021-07-09 17:40:09,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:40:09,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:09,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:09,984 INFO L225 Difference]: With dead ends: 566 [2021-07-09 17:40:09,984 INFO L226 Difference]: Without dead ends: 556 [2021-07-09 17:40:09,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:40:09,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-07-09 17:40:09,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 352. [2021-07-09 17:40:09,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.9715099715099713) internal successors, (1043), 351 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:09,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1043 transitions. [2021-07-09 17:40:09,989 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1043 transitions. Word has length 22 [2021-07-09 17:40:09,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:09,989 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1043 transitions. [2021-07-09 17:40:09,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:09,989 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1043 transitions. [2021-07-09 17:40:09,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:09,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:09,989 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:10,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1945,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:10,205 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:10,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:10,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1259786134, now seen corresponding path program 190 times [2021-07-09 17:40:10,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:10,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053859569] [2021-07-09 17:40:10,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:10,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:10,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053859569] [2021-07-09 17:40:10,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053859569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:10,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103853807] [2021-07-09 17:40:10,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:10,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:10,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:10,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:10,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:10,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103853807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:10,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:10,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:40:10,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580491605] [2021-07-09 17:40:10,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:40:10,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:10,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:40:10,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:40:10,484 INFO L87 Difference]: Start difference. First operand 352 states and 1043 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:10,709 INFO L93 Difference]: Finished difference Result 495 states and 1468 transitions. [2021-07-09 17:40:10,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:40:10,710 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:10,710 INFO L225 Difference]: With dead ends: 495 [2021-07-09 17:40:10,710 INFO L226 Difference]: Without dead ends: 495 [2021-07-09 17:40:10,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:40:10,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-09 17:40:10,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 349. [2021-07-09 17:40:10,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.971264367816092) internal successors, (1034), 348 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1034 transitions. [2021-07-09 17:40:10,715 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1034 transitions. Word has length 22 [2021-07-09 17:40:10,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:10,715 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1034 transitions. [2021-07-09 17:40:10,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:10,715 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1034 transitions. [2021-07-09 17:40:10,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:10,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:10,715 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:10,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1954,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:10,931 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:10,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1983718082, now seen corresponding path program 191 times [2021-07-09 17:40:10,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:10,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957400083] [2021-07-09 17:40:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:11,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:11,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957400083] [2021-07-09 17:40:11,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957400083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:11,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775049468] [2021-07-09 17:40:11,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:11,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:40:11,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:11,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:11,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:11,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775049468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:11,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:11,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:11,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458760916] [2021-07-09 17:40:11,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:11,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:11,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:11,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:11,213 INFO L87 Difference]: Start difference. First operand 349 states and 1034 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:11,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:11,424 INFO L93 Difference]: Finished difference Result 544 states and 1562 transitions. [2021-07-09 17:40:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:40:11,424 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:11,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:11,425 INFO L225 Difference]: With dead ends: 544 [2021-07-09 17:40:11,425 INFO L226 Difference]: Without dead ends: 544 [2021-07-09 17:40:11,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:40:11,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-09 17:40:11,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 357. [2021-07-09 17:40:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.9831460674157304) internal successors, (1062), 356 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1062 transitions. [2021-07-09 17:40:11,429 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1062 transitions. Word has length 22 [2021-07-09 17:40:11,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:11,429 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1062 transitions. [2021-07-09 17:40:11,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:11,430 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1062 transitions. [2021-07-09 17:40:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:11,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:11,430 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:11,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1960 [2021-07-09 17:40:11,646 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:11,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:11,646 INFO L82 PathProgramCache]: Analyzing trace with hash 471698638, now seen corresponding path program 192 times [2021-07-09 17:40:11,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:11,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443298279] [2021-07-09 17:40:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:11,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:11,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443298279] [2021-07-09 17:40:11,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443298279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:11,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433002896] [2021-07-09 17:40:11,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:11,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:40:11,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:11,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:11,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:11,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433002896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:11,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:11,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:11,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367181540] [2021-07-09 17:40:11,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:11,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:11,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:11,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:11,930 INFO L87 Difference]: Start difference. First operand 357 states and 1062 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:12,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:12,244 INFO L93 Difference]: Finished difference Result 490 states and 1410 transitions. [2021-07-09 17:40:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:40:12,245 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:12,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:12,245 INFO L225 Difference]: With dead ends: 490 [2021-07-09 17:40:12,245 INFO L226 Difference]: Without dead ends: 481 [2021-07-09 17:40:12,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 303.3ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:40:12,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-09 17:40:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 357. [2021-07-09 17:40:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.955056179775281) internal successors, (1052), 356 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1052 transitions. [2021-07-09 17:40:12,250 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1052 transitions. Word has length 22 [2021-07-09 17:40:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:12,250 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1052 transitions. [2021-07-09 17:40:12,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1052 transitions. [2021-07-09 17:40:12,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:12,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:12,250 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:12,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1965,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:12,465 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:12,465 INFO L82 PathProgramCache]: Analyzing trace with hash 293775178, now seen corresponding path program 193 times [2021-07-09 17:40:12,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:12,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101403064] [2021-07-09 17:40:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:12,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:12,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101403064] [2021-07-09 17:40:12,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101403064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:12,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485749130] [2021-07-09 17:40:12,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:12,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:12,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:12,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485749130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:12,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:12,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:40:12,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992090995] [2021-07-09 17:40:12,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:40:12,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:12,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:40:12,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:40:12,750 INFO L87 Difference]: Start difference. First operand 357 states and 1052 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:12,993 INFO L93 Difference]: Finished difference Result 454 states and 1342 transitions. [2021-07-09 17:40:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:40:12,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:12,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:12,994 INFO L225 Difference]: With dead ends: 454 [2021-07-09 17:40:12,994 INFO L226 Difference]: Without dead ends: 454 [2021-07-09 17:40:12,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:40:12,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-09 17:40:12,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 324. [2021-07-09 17:40:12,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-07-09 17:40:12,998 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-07-09 17:40:12,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:12,998 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-07-09 17:40:12,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:12,998 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-07-09 17:40:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:12,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:12,999 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:13,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1970 [2021-07-09 17:40:13,215 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:13,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:13,215 INFO L82 PathProgramCache]: Analyzing trace with hash 483357642, now seen corresponding path program 194 times [2021-07-09 17:40:13,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:13,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564766648] [2021-07-09 17:40:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:13,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:13,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564766648] [2021-07-09 17:40:13,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564766648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:13,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468265230] [2021-07-09 17:40:13,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:13,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:13,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:13,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:13,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:13,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468265230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:13,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:13,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-09 17:40:13,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746667828] [2021-07-09 17:40:13,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:40:13,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:13,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:40:13,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:40:13,438 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:13,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:13,967 INFO L93 Difference]: Finished difference Result 716 states and 2103 transitions. [2021-07-09 17:40:13,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:40:13,967 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:13,968 INFO L225 Difference]: With dead ends: 716 [2021-07-09 17:40:13,968 INFO L226 Difference]: Without dead ends: 614 [2021-07-09 17:40:13,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 336.5ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:40:13,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-07-09 17:40:13,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 309. [2021-07-09 17:40:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:13,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-07-09 17:40:13,973 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 22 [2021-07-09 17:40:13,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:13,973 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-07-09 17:40:13,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:13,973 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-07-09 17:40:13,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:13,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:13,973 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:14,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1974,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:14,190 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:14,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:14,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1787383922, now seen corresponding path program 195 times [2021-07-09 17:40:14,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:14,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809411089] [2021-07-09 17:40:14,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:14,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:14,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809411089] [2021-07-09 17:40:14,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809411089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:14,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111243941] [2021-07-09 17:40:14,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:14,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:40:14,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:14,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:40:14,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:14,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111243941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:14,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:14,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-07-09 17:40:14,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365602900] [2021-07-09 17:40:14,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:40:14,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:14,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:40:14,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:40:14,439 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:14,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:14,564 INFO L93 Difference]: Finished difference Result 627 states and 1817 transitions. [2021-07-09 17:40:14,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:40:14,564 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:14,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:14,565 INFO L225 Difference]: With dead ends: 627 [2021-07-09 17:40:14,565 INFO L226 Difference]: Without dead ends: 576 [2021-07-09 17:40:14,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:14,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-07-09 17:40:14,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 329. [2021-07-09 17:40:14,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.0091463414634148) internal successors, (987), 328 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:14,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 987 transitions. [2021-07-09 17:40:14,570 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 987 transitions. Word has length 22 [2021-07-09 17:40:14,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:14,570 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 987 transitions. [2021-07-09 17:40:14,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:14,570 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 987 transitions. [2021-07-09 17:40:14,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:14,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:14,570 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:14,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1977 [2021-07-09 17:40:14,783 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:14,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash -772869444, now seen corresponding path program 196 times [2021-07-09 17:40:14,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:14,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456511208] [2021-07-09 17:40:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:14,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:14,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456511208] [2021-07-09 17:40:14,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456511208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:14,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429873001] [2021-07-09 17:40:14,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:14,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:14,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:14,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:14,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:15,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429873001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:15,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:15,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:40:15,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533209086] [2021-07-09 17:40:15,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:15,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:15,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:15,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:15,046 INFO L87 Difference]: Start difference. First operand 329 states and 987 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:15,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:15,955 INFO L93 Difference]: Finished difference Result 999 states and 2873 transitions. [2021-07-09 17:40:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:40:15,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:15,956 INFO L225 Difference]: With dead ends: 999 [2021-07-09 17:40:15,956 INFO L226 Difference]: Without dead ends: 858 [2021-07-09 17:40:15,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 683.4ms TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:40:15,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-07-09 17:40:15,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 339. [2021-07-09 17:40:15,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.9792899408284024) internal successors, (1007), 338 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1007 transitions. [2021-07-09 17:40:15,962 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1007 transitions. Word has length 22 [2021-07-09 17:40:15,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:15,962 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1007 transitions. [2021-07-09 17:40:15,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:15,962 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1007 transitions. [2021-07-09 17:40:15,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:15,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:15,962 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:16,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1988,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:16,179 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:16,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:16,179 INFO L82 PathProgramCache]: Analyzing trace with hash 400799254, now seen corresponding path program 197 times [2021-07-09 17:40:16,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:16,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805945680] [2021-07-09 17:40:16,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:16,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:16,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805945680] [2021-07-09 17:40:16,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805945680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:16,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772758712] [2021-07-09 17:40:16,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:16,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:40:16,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:16,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:16,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:16,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772758712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:16,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:16,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:40:16,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558371953] [2021-07-09 17:40:16,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:16,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:16,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:16,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:16,448 INFO L87 Difference]: Start difference. First operand 339 states and 1007 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:17,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:17,166 INFO L93 Difference]: Finished difference Result 816 states and 2373 transitions. [2021-07-09 17:40:17,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:40:17,166 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:17,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:17,167 INFO L225 Difference]: With dead ends: 816 [2021-07-09 17:40:17,167 INFO L226 Difference]: Without dead ends: 714 [2021-07-09 17:40:17,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:40:17,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-07-09 17:40:17,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 304. [2021-07-09 17:40:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2021-07-09 17:40:17,172 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2021-07-09 17:40:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:17,172 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2021-07-09 17:40:17,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2021-07-09 17:40:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:17,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:17,172 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:17,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1993,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:17,387 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:17,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:17,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1757356874, now seen corresponding path program 198 times [2021-07-09 17:40:17,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:17,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923295864] [2021-07-09 17:40:17,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:17,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:17,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923295864] [2021-07-09 17:40:17,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923295864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:17,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311160687] [2021-07-09 17:40:17,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:17,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:40:17,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:17,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:17,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:17,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311160687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:17,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:17,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:17,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384335256] [2021-07-09 17:40:17,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:17,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:17,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:17,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:17,694 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:18,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:18,095 INFO L93 Difference]: Finished difference Result 674 states and 1948 transitions. [2021-07-09 17:40:18,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:40:18,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:18,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:18,096 INFO L225 Difference]: With dead ends: 674 [2021-07-09 17:40:18,096 INFO L226 Difference]: Without dead ends: 607 [2021-07-09 17:40:18,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 317.8ms TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:40:18,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-07-09 17:40:18,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 325. [2021-07-09 17:40:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.990740740740741) internal successors, (969), 324 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:18,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 969 transitions. [2021-07-09 17:40:18,100 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 969 transitions. Word has length 22 [2021-07-09 17:40:18,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:18,100 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 969 transitions. [2021-07-09 17:40:18,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:18,100 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 969 transitions. [2021-07-09 17:40:18,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:18,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:18,101 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:18,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2000,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:18,317 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:18,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1523095944, now seen corresponding path program 199 times [2021-07-09 17:40:18,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:18,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357868630] [2021-07-09 17:40:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:18,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:18,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357868630] [2021-07-09 17:40:18,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357868630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:18,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950460649] [2021-07-09 17:40:18,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:18,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:18,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:18,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:18,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:18,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:18,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:18,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:18,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:18,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:18,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:18,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:18,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:18,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:18,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:18,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:40:18,629 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:18,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:18,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:40:18,654 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:130, output treesize:51 [2021-07-09 17:40:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:18,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950460649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:18,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:18,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:18,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105636585] [2021-07-09 17:40:18,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:18,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:18,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:18,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:18,763 INFO L87 Difference]: Start difference. First operand 325 states and 969 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:19,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:19,325 INFO L93 Difference]: Finished difference Result 724 states and 2053 transitions. [2021-07-09 17:40:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:40:19,325 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:19,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:19,326 INFO L225 Difference]: With dead ends: 724 [2021-07-09 17:40:19,326 INFO L226 Difference]: Without dead ends: 628 [2021-07-09 17:40:19,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 496.1ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:40:19,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-07-09 17:40:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 318. [2021-07-09 17:40:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.968454258675079) internal successors, (941), 317 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 941 transitions. [2021-07-09 17:40:19,331 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 941 transitions. Word has length 22 [2021-07-09 17:40:19,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:19,331 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 941 transitions. [2021-07-09 17:40:19,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 941 transitions. [2021-07-09 17:40:19,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:19,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:19,331 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:19,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2022,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:19,545 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:19,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2110841266, now seen corresponding path program 200 times [2021-07-09 17:40:19,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:19,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769818261] [2021-07-09 17:40:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:19,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:19,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769818261] [2021-07-09 17:40:19,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769818261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:19,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794643899] [2021-07-09 17:40:19,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:19,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:19,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:19,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:19,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:19,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:19,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:19,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:19,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:19,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:19,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:19,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:19,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:19,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:19,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:19,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:19,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:19,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:40:19,899 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:19,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:19,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:40:19,925 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:130, output treesize:51 [2021-07-09 17:40:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:20,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794643899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:20,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:20,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:40:20,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998484187] [2021-07-09 17:40:20,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:40:20,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:20,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:40:20,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:20,025 INFO L87 Difference]: Start difference. First operand 318 states and 941 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:20,459 INFO L93 Difference]: Finished difference Result 418 states and 1234 transitions. [2021-07-09 17:40:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:40:20,459 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:20,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:20,460 INFO L225 Difference]: With dead ends: 418 [2021-07-09 17:40:20,460 INFO L226 Difference]: Without dead ends: 400 [2021-07-09 17:40:20,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 429.3ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:40:20,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-07-09 17:40:20,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 326. [2021-07-09 17:40:20,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9692307692307693) internal successors, (965), 325 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:20,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 965 transitions. [2021-07-09 17:40:20,465 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 965 transitions. Word has length 22 [2021-07-09 17:40:20,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:20,465 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 965 transitions. [2021-07-09 17:40:20,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:20,465 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 965 transitions. [2021-07-09 17:40:20,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:20,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:20,465 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:20,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2056 [2021-07-09 17:40:20,666 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:20,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:20,666 INFO L82 PathProgramCache]: Analyzing trace with hash 871558594, now seen corresponding path program 201 times [2021-07-09 17:40:20,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:20,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015397578] [2021-07-09 17:40:20,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:20,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:20,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015397578] [2021-07-09 17:40:20,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015397578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:20,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337851362] [2021-07-09 17:40:20,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:20,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:40:20,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:20,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:20,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:20,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:20,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:20,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:20,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:20,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:40:20,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:34 [2021-07-09 17:40:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:21,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337851362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:21,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:21,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:21,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773355688] [2021-07-09 17:40:21,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:21,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:21,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:21,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:21,180 INFO L87 Difference]: Start difference. First operand 326 states and 965 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:21,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:21,462 INFO L93 Difference]: Finished difference Result 774 states and 2239 transitions. [2021-07-09 17:40:21,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:40:21,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:21,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:21,463 INFO L225 Difference]: With dead ends: 774 [2021-07-09 17:40:21,463 INFO L226 Difference]: Without dead ends: 707 [2021-07-09 17:40:21,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 261.1ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:40:21,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-07-09 17:40:21,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 354. [2021-07-09 17:40:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.0509915014164304) internal successors, (1077), 353 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1077 transitions. [2021-07-09 17:40:21,469 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1077 transitions. Word has length 22 [2021-07-09 17:40:21,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:21,469 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1077 transitions. [2021-07-09 17:40:21,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:21,469 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1077 transitions. [2021-07-09 17:40:21,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:21,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:21,470 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:21,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2085,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:21,685 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:21,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:21,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1886073072, now seen corresponding path program 202 times [2021-07-09 17:40:21,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:21,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094622067] [2021-07-09 17:40:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:21,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:21,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094622067] [2021-07-09 17:40:21,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094622067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:21,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169401366] [2021-07-09 17:40:21,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:21,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:21,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:21,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:21,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:21,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:21,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:21,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:21,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:21,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:40:21,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:32 [2021-07-09 17:40:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:22,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169401366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:22,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:22,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-09 17:40:22,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902441274] [2021-07-09 17:40:22,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:22,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:22,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:22,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:22,157 INFO L87 Difference]: Start difference. First operand 354 states and 1077 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:22,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:22,476 INFO L93 Difference]: Finished difference Result 702 states and 2030 transitions. [2021-07-09 17:40:22,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:40:22,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:22,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:22,477 INFO L225 Difference]: With dead ends: 702 [2021-07-09 17:40:22,477 INFO L226 Difference]: Without dead ends: 606 [2021-07-09 17:40:22,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:40:22,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-07-09 17:40:22,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 367. [2021-07-09 17:40:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.010928961748634) internal successors, (1102), 366 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:22,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1102 transitions. [2021-07-09 17:40:22,482 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1102 transitions. Word has length 22 [2021-07-09 17:40:22,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:22,482 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 1102 transitions. [2021-07-09 17:40:22,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:22,482 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1102 transitions. [2021-07-09 17:40:22,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:22,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:22,483 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:22,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2172,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:22,698 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:22,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:22,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1235225526, now seen corresponding path program 203 times [2021-07-09 17:40:22,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:22,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078420066] [2021-07-09 17:40:22,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:22,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:22,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078420066] [2021-07-09 17:40:22,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078420066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:22,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137272736] [2021-07-09 17:40:22,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:22,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:22,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:22,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:22,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:22,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:22,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:22,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:22,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:22,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:40:22,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-07-09 17:40:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:23,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137272736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:23,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:23,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:23,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558534626] [2021-07-09 17:40:23,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:23,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:23,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:23,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:23,017 INFO L87 Difference]: Start difference. First operand 367 states and 1102 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:23,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:23,485 INFO L93 Difference]: Finished difference Result 533 states and 1563 transitions. [2021-07-09 17:40:23,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:40:23,485 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:23,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:23,486 INFO L225 Difference]: With dead ends: 533 [2021-07-09 17:40:23,486 INFO L226 Difference]: Without dead ends: 466 [2021-07-09 17:40:23,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 331.2ms TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:40:23,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-07-09 17:40:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 323. [2021-07-09 17:40:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.968944099378882) internal successors, (956), 322 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 956 transitions. [2021-07-09 17:40:23,490 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 956 transitions. Word has length 22 [2021-07-09 17:40:23,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:23,490 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 956 transitions. [2021-07-09 17:40:23,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:23,490 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 956 transitions. [2021-07-09 17:40:23,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:23,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:23,491 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:23,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2228,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:23,701 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:23,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:23,701 INFO L82 PathProgramCache]: Analyzing trace with hash 343747060, now seen corresponding path program 204 times [2021-07-09 17:40:23,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:23,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757610033] [2021-07-09 17:40:23,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:23,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:23,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757610033] [2021-07-09 17:40:23,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757610033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:23,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670166304] [2021-07-09 17:40:23,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:23,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:40:23,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:23,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:23,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:24,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:24,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:24,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:24,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:24,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:24,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:24,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:24,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:24,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:24,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:24,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:24,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:24,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:24,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:24,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:24,270 INFO L628 ElimStorePlain]: treesize reduction 20, result has 79.6 percent of original size [2021-07-09 17:40:24,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-07-09 17:40:24,272 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:177, output treesize:78 [2021-07-09 17:40:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:24,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670166304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:24,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:24,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:40:24,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077597408] [2021-07-09 17:40:24,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:40:24,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:24,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:40:24,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:24,449 INFO L87 Difference]: Start difference. First operand 323 states and 956 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:24,906 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-07-09 17:40:25,106 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-07-09 17:40:25,245 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-07-09 17:40:25,546 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-07-09 17:40:25,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:25,585 INFO L93 Difference]: Finished difference Result 585 states and 1689 transitions. [2021-07-09 17:40:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:40:25,586 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:25,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:25,586 INFO L225 Difference]: With dead ends: 585 [2021-07-09 17:40:25,586 INFO L226 Difference]: Without dead ends: 424 [2021-07-09 17:40:25,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1143.2ms TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:40:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-07-09 17:40:25,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 316. [2021-07-09 17:40:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.961904761904762) internal successors, (933), 315 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:25,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 933 transitions. [2021-07-09 17:40:25,590 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 933 transitions. Word has length 22 [2021-07-09 17:40:25,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:25,590 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 933 transitions. [2021-07-09 17:40:25,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:25,590 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 933 transitions. [2021-07-09 17:40:25,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:40:25,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:25,591 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:25,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2240,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:25,801 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:25,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:25,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1676379422, now seen corresponding path program 205 times [2021-07-09 17:40:25,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:25,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772741540] [2021-07-09 17:40:25,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:25,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:25,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772741540] [2021-07-09 17:40:25,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772741540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:25,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558330524] [2021-07-09 17:40:25,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:26,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:40:26,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:26,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:26,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:26,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:26,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:26,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:26,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:26,450 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-07-09 17:40:26,451 INFO L628 ElimStorePlain]: treesize reduction 71, result has 69.8 percent of original size [2021-07-09 17:40:26,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:26,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:26,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:26,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:26,549 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:26,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:26,553 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:26,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:26,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:26,638 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:26,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:26,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:40:26,719 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:247, output treesize:150 [2021-07-09 17:40:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:26,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558330524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:26,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:26,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-07-09 17:40:26,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316475334] [2021-07-09 17:40:26,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:40:26,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:26,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:40:26,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:26,925 INFO L87 Difference]: Start difference. First operand 316 states and 933 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:27,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:27,971 INFO L93 Difference]: Finished difference Result 497 states and 1429 transitions. [2021-07-09 17:40:27,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:40:27,971 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:40:27,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:27,972 INFO L225 Difference]: With dead ends: 497 [2021-07-09 17:40:27,972 INFO L226 Difference]: Without dead ends: 386 [2021-07-09 17:40:27,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1065.0ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:40:27,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-07-09 17:40:27,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 304. [2021-07-09 17:40:27,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:27,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2021-07-09 17:40:27,975 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2021-07-09 17:40:27,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:27,975 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2021-07-09 17:40:27,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:27,976 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2021-07-09 17:40:27,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:40:27,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:27,976 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:28,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2324 [2021-07-09 17:40:28,185 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:28,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:28,185 INFO L82 PathProgramCache]: Analyzing trace with hash -410758918, now seen corresponding path program 206 times [2021-07-09 17:40:28,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:28,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043453831] [2021-07-09 17:40:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:28,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:28,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043453831] [2021-07-09 17:40:28,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043453831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:28,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229087481] [2021-07-09 17:40:28,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:28,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:28,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:28,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:40:28,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:28,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:28,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:28,495 INFO L628 ElimStorePlain]: treesize reduction 26, result has 77.2 percent of original size [2021-07-09 17:40:28,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:28,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:28,558 INFO L628 ElimStorePlain]: treesize reduction 19, result has 77.4 percent of original size [2021-07-09 17:40:28,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:28,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:28,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:28,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:28,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:28,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:28,619 INFO L518 ElimStorePlain]: Eliminatee v_prenex_52 vanished before elimination [2021-07-09 17:40:28,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:40:28,622 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:117, output treesize:50 [2021-07-09 17:40:29,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:29,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:29,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:29,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:29,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:29,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:29,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:29,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:29,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:40:29,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:29,120 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:40:29,121 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:29,231 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-07-09 17:40:29,231 INFO L628 ElimStorePlain]: treesize reduction 133, result has 42.7 percent of original size [2021-07-09 17:40:29,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:29,235 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:29,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:29,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:40:29,285 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:306, output treesize:70 [2021-07-09 17:40:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:29,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229087481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:29,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:29,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:29,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802004879] [2021-07-09 17:40:29,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:29,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:29,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:29,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:29,437 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:30,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:30,388 INFO L93 Difference]: Finished difference Result 860 states and 2502 transitions. [2021-07-09 17:40:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:40:30,388 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:40:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:30,389 INFO L225 Difference]: With dead ends: 860 [2021-07-09 17:40:30,389 INFO L226 Difference]: Without dead ends: 766 [2021-07-09 17:40:30,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1049.4ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:40:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-07-09 17:40:30,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 333. [2021-07-09 17:40:30,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0542168674698793) internal successors, (1014), 332 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1014 transitions. [2021-07-09 17:40:30,394 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1014 transitions. Word has length 23 [2021-07-09 17:40:30,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:30,394 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1014 transitions. [2021-07-09 17:40:30,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:30,394 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1014 transitions. [2021-07-09 17:40:30,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:40:30,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:30,395 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:30,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2352,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:30,609 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:30,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:30,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2116971352, now seen corresponding path program 207 times [2021-07-09 17:40:30,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:30,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88482051] [2021-07-09 17:40:30,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:30,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:30,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88482051] [2021-07-09 17:40:30,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88482051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:30,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437965004] [2021-07-09 17:40:30,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:30,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:40:30,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:30,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:40:30,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:30,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:30,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:30,996 INFO L628 ElimStorePlain]: treesize reduction 31, result has 73.9 percent of original size [2021-07-09 17:40:30,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:31,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:31,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:31,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:31,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:31,006 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:31,060 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-07-09 17:40:31,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:40:31,062 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:122, output treesize:50 [2021-07-09 17:40:31,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:31,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:31,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:40:31,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:31,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:31,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:31,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:31,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:31,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:31,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:31,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:31,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:31,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:40:31,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:31,459 INFO L628 ElimStorePlain]: treesize reduction 29, result has 59.7 percent of original size [2021-07-09 17:40:31,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:31,460 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-07-09 17:40:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:31,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437965004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:31,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:31,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-09 17:40:31,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119965919] [2021-07-09 17:40:31,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:40:31,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:31,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:40:31,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:31,524 INFO L87 Difference]: Start difference. First operand 333 states and 1014 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:34,180 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-07-09 17:40:34,854 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2021-07-09 17:40:35,714 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-07-09 17:40:35,955 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-07-09 17:40:36,124 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-07-09 17:40:36,280 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-07-09 17:40:36,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:36,395 INFO L93 Difference]: Finished difference Result 1183 states and 3328 transitions. [2021-07-09 17:40:36,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:40:36,395 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:40:36,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:36,397 INFO L225 Difference]: With dead ends: 1183 [2021-07-09 17:40:36,397 INFO L226 Difference]: Without dead ends: 983 [2021-07-09 17:40:36,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 4424.8ms TimeCoverageRelationStatistics Valid=596, Invalid=3564, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 17:40:36,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-07-09 17:40:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 404. [2021-07-09 17:40:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.129032258064516) internal successors, (1261), 403 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1261 transitions. [2021-07-09 17:40:36,403 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1261 transitions. Word has length 23 [2021-07-09 17:40:36,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:36,403 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1261 transitions. [2021-07-09 17:40:36,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:36,403 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1261 transitions. [2021-07-09 17:40:36,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:40:36,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:36,404 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:36,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2509,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:36,620 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:36,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:36,620 INFO L82 PathProgramCache]: Analyzing trace with hash -305065448, now seen corresponding path program 208 times [2021-07-09 17:40:36,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:36,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483163120] [2021-07-09 17:40:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:36,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:36,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483163120] [2021-07-09 17:40:36,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483163120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:36,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462644490] [2021-07-09 17:40:36,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:36,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:36,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:36,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:40:36,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:36,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:36,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:36,988 INFO L628 ElimStorePlain]: treesize reduction 31, result has 73.9 percent of original size [2021-07-09 17:40:36,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:36,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:37,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:37,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:37,033 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:37,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:37,036 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:37,105 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-07-09 17:40:37,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:40:37,107 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:122, output treesize:50 [2021-07-09 17:40:37,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:37,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:37,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:37,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:37,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:40:37,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:37,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:37,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:40:37,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:37,501 INFO L628 ElimStorePlain]: treesize reduction 50, result has 46.2 percent of original size [2021-07-09 17:40:37,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:37,502 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-07-09 17:40:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:37,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462644490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:37,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:37,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-09 17:40:37,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035533154] [2021-07-09 17:40:37,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:40:37,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:37,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:40:37,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:40:37,575 INFO L87 Difference]: Start difference. First operand 404 states and 1261 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:40,290 INFO L93 Difference]: Finished difference Result 977 states and 2802 transitions. [2021-07-09 17:40:40,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:40:40,291 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:40:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:40,292 INFO L225 Difference]: With dead ends: 977 [2021-07-09 17:40:40,292 INFO L226 Difference]: Without dead ends: 823 [2021-07-09 17:40:40,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 2476.8ms TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:40:40,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-07-09 17:40:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 427. [2021-07-09 17:40:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.1103286384976525) internal successors, (1325), 426 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1325 transitions. [2021-07-09 17:40:40,298 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1325 transitions. Word has length 23 [2021-07-09 17:40:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:40,298 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1325 transitions. [2021-07-09 17:40:40,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:40,298 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1325 transitions. [2021-07-09 17:40:40,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:40:40,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:40,299 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:40,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2563 [2021-07-09 17:40:40,514 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:40,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:40,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1627372824, now seen corresponding path program 209 times [2021-07-09 17:40:40,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:40,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545071668] [2021-07-09 17:40:40,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:40,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:40,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545071668] [2021-07-09 17:40:40,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545071668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:40,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117377219] [2021-07-09 17:40:40,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:40,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:40:40,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:40,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:40:40,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:40,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:40,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:40,833 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.7 percent of original size [2021-07-09 17:40:40,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:40,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:40,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:40,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:40,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:40,846 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:40,897 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-07-09 17:40:40,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:40:40,899 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:95, output treesize:50 [2021-07-09 17:40:41,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:41,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:41,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:41,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:41,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:41,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:41,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:40:41,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:41,133 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:40:41,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:41,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:41,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:40:41,143 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:82, output treesize:20 [2021-07-09 17:40:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:41,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117377219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:41,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:41,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:41,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413826754] [2021-07-09 17:40:41,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:41,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:41,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:41,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:41,195 INFO L87 Difference]: Start difference. First operand 427 states and 1325 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:43,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:43,452 INFO L93 Difference]: Finished difference Result 970 states and 2782 transitions. [2021-07-09 17:40:43,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:40:43,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:40:43,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:43,454 INFO L225 Difference]: With dead ends: 970 [2021-07-09 17:40:43,454 INFO L226 Difference]: Without dead ends: 830 [2021-07-09 17:40:43,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1979.4ms TimeCoverageRelationStatistics Valid=336, Invalid=1470, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:40:43,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-09 17:40:43,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 517. [2021-07-09 17:40:43,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 3.011627906976744) internal successors, (1554), 516 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:43,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1554 transitions. [2021-07-09 17:40:43,461 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1554 transitions. Word has length 23 [2021-07-09 17:40:43,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:43,461 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1554 transitions. [2021-07-09 17:40:43,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:43,461 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1554 transitions. [2021-07-09 17:40:43,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:40:43,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:43,462 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:43,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2641,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:43,662 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:43,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:43,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1406216122, now seen corresponding path program 210 times [2021-07-09 17:40:43,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:43,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987337392] [2021-07-09 17:40:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:43,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:43,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987337392] [2021-07-09 17:40:43,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987337392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:43,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899155876] [2021-07-09 17:40:43,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:43,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:40:43,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:43,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:40:43,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:43,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:43,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:44,034 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-07-09 17:40:44,034 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-07-09 17:40:44,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:44,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:44,108 INFO L628 ElimStorePlain]: treesize reduction 50, result has 58.7 percent of original size [2021-07-09 17:40:44,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:44,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:44,172 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.6 percent of original size [2021-07-09 17:40:44,172 INFO L518 ElimStorePlain]: Eliminatee v_prenex_63 vanished before elimination [2021-07-09 17:40:44,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:40:44,174 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:132, output treesize:57 [2021-07-09 17:40:44,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:44,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:44,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:44,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:44,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:44,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:44,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:44,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:44,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:44,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:44,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:44,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:44,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:44,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:44,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:44,746 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-07-09 17:40:44,746 INFO L628 ElimStorePlain]: treesize reduction 99, result has 55.2 percent of original size [2021-07-09 17:40:44,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:44,750 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:44,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:44,754 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:44,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:44,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:40:44,831 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:301, output treesize:78 [2021-07-09 17:40:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:40:44,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899155876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:44,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:44,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:40:44,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106522807] [2021-07-09 17:40:44,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:44,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:44,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:44,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:44,986 INFO L87 Difference]: Start difference. First operand 517 states and 1554 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:46,913 INFO L93 Difference]: Finished difference Result 1104 states and 3228 transitions. [2021-07-09 17:40:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:40:46,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:40:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:46,915 INFO L225 Difference]: With dead ends: 1104 [2021-07-09 17:40:46,915 INFO L226 Difference]: Without dead ends: 897 [2021-07-09 17:40:46,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1474.6ms TimeCoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:40:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-07-09 17:40:46,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 558. [2021-07-09 17:40:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.0215439856373427) internal successors, (1683), 557 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1683 transitions. [2021-07-09 17:40:46,922 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1683 transitions. Word has length 23 [2021-07-09 17:40:46,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:46,922 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 1683 transitions. [2021-07-09 17:40:46,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:46,922 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1683 transitions. [2021-07-09 17:40:46,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:40:46,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:46,923 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:47,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2678 [2021-07-09 17:40:47,139 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:47,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:47,139 INFO L82 PathProgramCache]: Analyzing trace with hash 637122102, now seen corresponding path program 211 times [2021-07-09 17:40:47,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:47,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865081098] [2021-07-09 17:40:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:47,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:47,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865081098] [2021-07-09 17:40:47,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865081098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:47,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130920753] [2021-07-09 17:40:47,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:47,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:40:47,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:47,529 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_68, v_prenex_69, ends_with_2, v_prenex_70], 1=[ends_with_6]} [2021-07-09 17:40:47,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:47,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:47,537 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:40:47,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:47,620 INFO L628 ElimStorePlain]: treesize reduction 124, result has 39.5 percent of original size [2021-07-09 17:40:47,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:47,624 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:47,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:47,660 INFO L518 ElimStorePlain]: Eliminatee ends_with_2 vanished before elimination [2021-07-09 17:40:47,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:47,663 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:47,730 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2021-07-09 17:40:47,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:47,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:47,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:47,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:47,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:47,741 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:47,793 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.4 percent of original size [2021-07-09 17:40:47,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:47,795 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:241, output treesize:35 [2021-07-09 17:40:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:47,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130920753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:47,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:47,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:40:47,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181433453] [2021-07-09 17:40:47,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:40:47,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:47,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:40:47,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:40:47,879 INFO L87 Difference]: Start difference. First operand 558 states and 1683 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:48,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:48,175 INFO L93 Difference]: Finished difference Result 750 states and 2242 transitions. [2021-07-09 17:40:48,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:40:48,176 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:40:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:48,177 INFO L225 Difference]: With dead ends: 750 [2021-07-09 17:40:48,177 INFO L226 Difference]: Without dead ends: 696 [2021-07-09 17:40:48,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:40:48,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-07-09 17:40:48,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 558. [2021-07-09 17:40:48,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.0215439856373427) internal successors, (1683), 557 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:48,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1683 transitions. [2021-07-09 17:40:48,183 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1683 transitions. Word has length 23 [2021-07-09 17:40:48,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:48,183 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 1683 transitions. [2021-07-09 17:40:48,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:48,183 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1683 transitions. [2021-07-09 17:40:48,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:40:48,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:48,184 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:48,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2837,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:48,396 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:48,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:48,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1079785372, now seen corresponding path program 212 times [2021-07-09 17:40:48,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:48,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562286094] [2021-07-09 17:40:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:48,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:48,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562286094] [2021-07-09 17:40:48,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562286094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:48,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064855448] [2021-07-09 17:40:48,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:48,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:40:48,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:48,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:40:48,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:48,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:48,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:48,747 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.2 percent of original size [2021-07-09 17:40:48,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:48,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:48,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:48,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:48,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:48,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:48,819 INFO L628 ElimStorePlain]: treesize reduction 22, result has 75.3 percent of original size [2021-07-09 17:40:48,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:40:48,821 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:107, output treesize:59 [2021-07-09 17:40:49,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:49,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:49,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:49,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:49,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:49,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:49,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:49,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:49,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:40:49,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:49,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:49,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:49,022 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:49,134 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-07-09 17:40:49,135 INFO L628 ElimStorePlain]: treesize reduction 136, result has 42.1 percent of original size [2021-07-09 17:40:49,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:49,139 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:49,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:49,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:40:49,189 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:309, output treesize:70 [2021-07-09 17:40:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:49,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064855448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:49,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:49,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:40:49,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646985570] [2021-07-09 17:40:49,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:40:49,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:49,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:40:49,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:40:49,338 INFO L87 Difference]: Start difference. First operand 558 states and 1683 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:50,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:50,123 INFO L93 Difference]: Finished difference Result 1129 states and 3259 transitions. [2021-07-09 17:40:50,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:40:50,123 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:40:50,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:50,124 INFO L225 Difference]: With dead ends: 1129 [2021-07-09 17:40:50,124 INFO L226 Difference]: Without dead ends: 967 [2021-07-09 17:40:50,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 831.8ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:40:50,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-07-09 17:40:50,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 588. [2021-07-09 17:40:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.110732538330494) internal successors, (1826), 587 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1826 transitions. [2021-07-09 17:40:50,132 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1826 transitions. Word has length 23 [2021-07-09 17:40:50,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:50,132 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1826 transitions. [2021-07-09 17:40:50,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:50,132 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1826 transitions. [2021-07-09 17:40:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:40:50,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:50,133 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:50,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2876 [2021-07-09 17:40:50,349 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:50,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:50,349 INFO L82 PathProgramCache]: Analyzing trace with hash 353330104, now seen corresponding path program 213 times [2021-07-09 17:40:50,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:50,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401925193] [2021-07-09 17:40:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:50,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:50,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401925193] [2021-07-09 17:40:50,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401925193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:50,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469021301] [2021-07-09 17:40:50,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:50,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:40:50,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:50,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:40:50,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:50,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:50,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:50,687 INFO L628 ElimStorePlain]: treesize reduction 34, result has 74.6 percent of original size [2021-07-09 17:40:50,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:50,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:50,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:50,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:50,759 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.1 percent of original size [2021-07-09 17:40:50,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:50,762 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:50,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:50,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:40:50,796 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:59 [2021-07-09 17:40:51,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:51,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:51,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:51,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:51,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:51,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:51,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:40:51,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:51,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:40:51,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:51,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:51,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:51,018 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:51,052 INFO L628 ElimStorePlain]: treesize reduction 29, result has 59.7 percent of original size [2021-07-09 17:40:51,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:51,054 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-07-09 17:40:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:51,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469021301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:51,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:51,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-07-09 17:40:51,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264851497] [2021-07-09 17:40:51,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:40:51,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:51,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:40:51,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:40:51,111 INFO L87 Difference]: Start difference. First operand 588 states and 1826 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:52,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:52,761 INFO L93 Difference]: Finished difference Result 1145 states and 3412 transitions. [2021-07-09 17:40:52,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:40:52,761 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:40:52,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:52,763 INFO L225 Difference]: With dead ends: 1145 [2021-07-09 17:40:52,763 INFO L226 Difference]: Without dead ends: 965 [2021-07-09 17:40:52,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1312.4ms TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:40:52,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-07-09 17:40:52,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 639. [2021-07-09 17:40:52,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.115987460815047) internal successors, (1988), 638 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1988 transitions. [2021-07-09 17:40:52,771 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1988 transitions. Word has length 23 [2021-07-09 17:40:52,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:52,771 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 1988 transitions. [2021-07-09 17:40:52,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:52,772 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1988 transitions. [2021-07-09 17:40:52,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:40:52,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:52,772 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:52,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2930,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:52,973 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:52,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:52,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1859126854, now seen corresponding path program 214 times [2021-07-09 17:40:52,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:52,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066373102] [2021-07-09 17:40:52,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:53,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:53,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066373102] [2021-07-09 17:40:53,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066373102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:53,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194979512] [2021-07-09 17:40:53,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:53,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:40:53,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:53,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:40:53,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:53,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:53,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:53,401 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-07-09 17:40:53,402 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-07-09 17:40:53,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:53,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:53,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:53,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:53,502 INFO L628 ElimStorePlain]: treesize reduction 52, result has 64.9 percent of original size [2021-07-09 17:40:53,502 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-07-09 17:40:53,502 INFO L518 ElimStorePlain]: Eliminatee ends_with_2 vanished before elimination [2021-07-09 17:40:53,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:53,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:53,571 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.1 percent of original size [2021-07-09 17:40:53,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-07-09 17:40:53,574 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:160, output treesize:70 [2021-07-09 17:40:54,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:54,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:54,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:54,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:54,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:54,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:54,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:54,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:54,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:54,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:54,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:54,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:54,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:54,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:40:54,171 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:54,312 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-07-09 17:40:54,313 INFO L628 ElimStorePlain]: treesize reduction 199, result has 37.8 percent of original size [2021-07-09 17:40:54,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:54,317 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:54,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:54,321 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:54,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:54,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:54,383 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:54,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:54,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:40:54,457 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:394, output treesize:68 [2021-07-09 17:40:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:54,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194979512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:54,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:54,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 17:40:54,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532519582] [2021-07-09 17:40:54,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:40:54,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:54,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:40:54,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:54,613 INFO L87 Difference]: Start difference. First operand 639 states and 1988 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:57,785 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-07-09 17:40:57,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:40:57,797 INFO L93 Difference]: Finished difference Result 1668 states and 4813 transitions. [2021-07-09 17:40:57,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 17:40:57,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:40:57,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:40:57,799 INFO L225 Difference]: With dead ends: 1668 [2021-07-09 17:40:57,799 INFO L226 Difference]: Without dead ends: 1480 [2021-07-09 17:40:57,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2847.4ms TimeCoverageRelationStatistics Valid=354, Invalid=2402, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:40:57,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-07-09 17:40:57,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 678. [2021-07-09 17:40:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 3.193500738552437) internal successors, (2162), 677 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2162 transitions. [2021-07-09 17:40:57,809 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2162 transitions. Word has length 23 [2021-07-09 17:40:57,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:40:57,809 INFO L482 AbstractCegarLoop]: Abstraction has 678 states and 2162 transitions. [2021-07-09 17:40:57,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:40:57,809 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2162 transitions. [2021-07-09 17:40:57,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:40:57,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:40:57,810 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:40:58,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2964 [2021-07-09 17:40:58,027 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:40:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:40:58,027 INFO L82 PathProgramCache]: Analyzing trace with hash 630316840, now seen corresponding path program 215 times [2021-07-09 17:40:58,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:40:58,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300210913] [2021-07-09 17:40:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:40:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:40:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:40:58,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:40:58,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300210913] [2021-07-09 17:40:58,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300210913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:58,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547070990] [2021-07-09 17:40:58,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:40:58,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:40:58,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:40:58,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:40:58,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:40:58,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:58,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:58,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:58,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:58,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:40:58,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:58,370 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.7 percent of original size [2021-07-09 17:40:58,370 INFO L518 ElimStorePlain]: Eliminatee v_prenex_86 vanished before elimination [2021-07-09 17:40:58,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:40:58,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:58,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:58,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:40:58,405 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:59 [2021-07-09 17:40:58,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:58,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:58,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:40:58,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:58,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:58,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:58,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:40:58,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:58,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:40:58,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:40:58,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:58,686 INFO L628 ElimStorePlain]: treesize reduction 86, result has 40.7 percent of original size [2021-07-09 17:40:58,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:40:58,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:40:58,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:40:58,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:40:58,714 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:37 [2021-07-09 17:40:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:40:58,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547070990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:40:58,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:40:58,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 17:40:58,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261969198] [2021-07-09 17:40:58,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:40:58,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:40:58,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:40:58,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:40:58,822 INFO L87 Difference]: Start difference. First operand 678 states and 2162 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:00,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:00,725 INFO L93 Difference]: Finished difference Result 1398 states and 4082 transitions. [2021-07-09 17:41:00,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:41:00,725 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:00,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:00,727 INFO L225 Difference]: With dead ends: 1398 [2021-07-09 17:41:00,727 INFO L226 Difference]: Without dead ends: 1240 [2021-07-09 17:41:00,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1559.6ms TimeCoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:41:00,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-07-09 17:41:00,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 675. [2021-07-09 17:41:00,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 3.1839762611275964) internal successors, (2146), 674 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 2146 transitions. [2021-07-09 17:41:00,737 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 2146 transitions. Word has length 23 [2021-07-09 17:41:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:00,737 INFO L482 AbstractCegarLoop]: Abstraction has 675 states and 2146 transitions. [2021-07-09 17:41:00,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:00,737 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 2146 transitions. [2021-07-09 17:41:00,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:00,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:00,738 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:00,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3182 [2021-07-09 17:41:00,954 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:00,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:00,955 INFO L82 PathProgramCache]: Analyzing trace with hash 620245514, now seen corresponding path program 216 times [2021-07-09 17:41:00,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:00,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708251141] [2021-07-09 17:41:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:01,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:01,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708251141] [2021-07-09 17:41:01,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708251141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:01,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202157723] [2021-07-09 17:41:01,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:01,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:41:01,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:01,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:41:01,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:01,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:01,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:01,328 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-07-09 17:41:01,328 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-07-09 17:41:01,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:01,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:01,403 INFO L628 ElimStorePlain]: treesize reduction 50, result has 58.3 percent of original size [2021-07-09 17:41:01,403 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-07-09 17:41:01,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:01,407 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:01,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:01,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:41:01,440 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:132, output treesize:59 [2021-07-09 17:41:01,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:01,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:01,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:41:01,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:01,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:01,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:01,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:41:01,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:01,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:01,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:41:01,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:01,675 INFO L628 ElimStorePlain]: treesize reduction 20, result has 58.3 percent of original size [2021-07-09 17:41:01,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:01,676 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:82, output treesize:20 [2021-07-09 17:41:01,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:41:01,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202157723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:01,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:01,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 17:41:01,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995945363] [2021-07-09 17:41:01,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:41:01,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:01,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:41:01,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:01,727 INFO L87 Difference]: Start difference. First operand 675 states and 2146 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:02,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:02,384 INFO L93 Difference]: Finished difference Result 931 states and 2785 transitions. [2021-07-09 17:41:02,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:41:02,385 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:02,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:02,386 INFO L225 Difference]: With dead ends: 931 [2021-07-09 17:41:02,386 INFO L226 Difference]: Without dead ends: 811 [2021-07-09 17:41:02,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 567.9ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:41:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-07-09 17:41:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 677. [2021-07-09 17:41:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 3.1819526627218937) internal successors, (2151), 676 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2151 transitions. [2021-07-09 17:41:02,394 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2151 transitions. Word has length 23 [2021-07-09 17:41:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:02,394 INFO L482 AbstractCegarLoop]: Abstraction has 677 states and 2151 transitions. [2021-07-09 17:41:02,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:02,394 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2151 transitions. [2021-07-09 17:41:02,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:02,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:02,395 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:02,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3219,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:02,611 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:02,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:02,611 INFO L82 PathProgramCache]: Analyzing trace with hash -161287938, now seen corresponding path program 217 times [2021-07-09 17:41:02,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:02,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082034735] [2021-07-09 17:41:02,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:41:02,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:02,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082034735] [2021-07-09 17:41:02,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082034735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:02,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208720988] [2021-07-09 17:41:02,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:02,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:41:02,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:02,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:02,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:02,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:02,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:02,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:02,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:02,971 INFO L628 ElimStorePlain]: treesize reduction 55, result has 56.0 percent of original size [2021-07-09 17:41:02,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:02,974 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:03,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:03,005 INFO L518 ElimStorePlain]: Eliminatee v_prenex_94 vanished before elimination [2021-07-09 17:41:03,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:41:03,007 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:59 [2021-07-09 17:41:03,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:03,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:03,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:41:03,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:03,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:03,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:03,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:41:03,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:03,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:03,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:03,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:41:03,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:03,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:03,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:41:03,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:03,321 INFO L628 ElimStorePlain]: treesize reduction 49, result has 46.7 percent of original size [2021-07-09 17:41:03,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:41:03,322 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:35 [2021-07-09 17:41:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:03,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208720988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:03,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:03,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-07-09 17:41:03,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068873930] [2021-07-09 17:41:03,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:41:03,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:03,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:41:03,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:03,383 INFO L87 Difference]: Start difference. First operand 677 states and 2151 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:05,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:05,441 INFO L93 Difference]: Finished difference Result 1484 states and 4400 transitions. [2021-07-09 17:41:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:41:05,442 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:05,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:05,444 INFO L225 Difference]: With dead ends: 1484 [2021-07-09 17:41:05,444 INFO L226 Difference]: Without dead ends: 1238 [2021-07-09 17:41:05,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1778.3ms TimeCoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:41:05,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-07-09 17:41:05,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 688. [2021-07-09 17:41:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 3.1935953420669576) internal successors, (2194), 687 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2194 transitions. [2021-07-09 17:41:05,453 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2194 transitions. Word has length 23 [2021-07-09 17:41:05,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:05,453 INFO L482 AbstractCegarLoop]: Abstraction has 688 states and 2194 transitions. [2021-07-09 17:41:05,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:05,453 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2194 transitions. [2021-07-09 17:41:05,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:05,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:05,469 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:05,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3248 [2021-07-09 17:41:05,700 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:05,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:05,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1644882548, now seen corresponding path program 218 times [2021-07-09 17:41:05,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:05,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33869567] [2021-07-09 17:41:05,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:05,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:05,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33869567] [2021-07-09 17:41:05,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33869567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:05,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570635760] [2021-07-09 17:41:05,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:05,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:05,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:05,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:41:05,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:05,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:05,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:06,064 INFO L628 ElimStorePlain]: treesize reduction 29, result has 77.5 percent of original size [2021-07-09 17:41:06,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:06,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:06,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:06,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:06,115 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:06,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:06,157 INFO L518 ElimStorePlain]: Eliminatee v_prenex_98 vanished before elimination [2021-07-09 17:41:06,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:06,160 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:06,223 INFO L628 ElimStorePlain]: treesize reduction 22, result has 75.3 percent of original size [2021-07-09 17:41:06,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:41:06,225 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:132, output treesize:59 [2021-07-09 17:41:06,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:06,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:06,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:41:06,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:06,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:06,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:06,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:41:06,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:06,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:06,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:06,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:41:06,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:06,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:06,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:41:06,467 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:06,506 INFO L628 ElimStorePlain]: treesize reduction 50, result has 46.2 percent of original size [2021-07-09 17:41:06,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:41:06,507 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-07-09 17:41:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:41:06,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570635760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:06,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:06,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:41:06,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573356125] [2021-07-09 17:41:06,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:41:06,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:06,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:41:06,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:06,572 INFO L87 Difference]: Start difference. First operand 688 states and 2194 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:07,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:07,961 INFO L93 Difference]: Finished difference Result 1183 states and 3509 transitions. [2021-07-09 17:41:07,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:41:07,962 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:07,964 INFO L225 Difference]: With dead ends: 1183 [2021-07-09 17:41:07,964 INFO L226 Difference]: Without dead ends: 1017 [2021-07-09 17:41:07,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1071.7ms TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:41:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-07-09 17:41:07,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 669. [2021-07-09 17:41:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.179640718562874) internal successors, (2124), 668 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:07,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2124 transitions. [2021-07-09 17:41:07,978 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2124 transitions. Word has length 23 [2021-07-09 17:41:07,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:07,978 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2124 transitions. [2021-07-09 17:41:07,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:07,978 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2124 transitions. [2021-07-09 17:41:07,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:07,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:07,979 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:08,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3305,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:08,187 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:08,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2094348922, now seen corresponding path program 219 times [2021-07-09 17:41:08,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:08,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035277191] [2021-07-09 17:41:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:08,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:08,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035277191] [2021-07-09 17:41:08,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035277191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:08,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161329258] [2021-07-09 17:41:08,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:08,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:41:08,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:08,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:41:08,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:08,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:08,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:08,598 INFO L628 ElimStorePlain]: treesize reduction 72, result has 54.7 percent of original size [2021-07-09 17:41:08,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:08,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:08,647 INFO L628 ElimStorePlain]: treesize reduction 31, result has 62.7 percent of original size [2021-07-09 17:41:08,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:41:08,649 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:162, output treesize:42 [2021-07-09 17:41:08,928 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_102, ends_with_2, v_prenex_104, v_prenex_103, v_prenex_105], 1=[ends_with_6]} [2021-07-09 17:41:08,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:08,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:08,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:08,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:09,074 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-07-09 17:41:09,074 INFO L628 ElimStorePlain]: treesize reduction 126, result has 51.4 percent of original size [2021-07-09 17:41:09,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:09,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:09,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:09,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:09,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:09,145 INFO L518 ElimStorePlain]: Eliminatee v_prenex_104 vanished before elimination [2021-07-09 17:41:09,145 INFO L518 ElimStorePlain]: Eliminatee v_prenex_103 vanished before elimination [2021-07-09 17:41:09,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:09,149 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:09,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:09,153 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:09,265 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-07-09 17:41:09,265 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-07-09 17:41:09,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:09,269 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:09,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:09,273 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:09,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:09,276 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:09,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:09,279 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:09,375 INFO L628 ElimStorePlain]: treesize reduction 22, result has 78.6 percent of original size [2021-07-09 17:41:09,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:41:09,376 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 8 variables, input treesize:298, output treesize:35 [2021-07-09 17:41:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:41:09,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161329258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:09,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:09,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-09 17:41:09,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531799921] [2021-07-09 17:41:09,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:41:09,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:09,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:41:09,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:41:09,453 INFO L87 Difference]: Start difference. First operand 669 states and 2124 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:12,532 INFO L93 Difference]: Finished difference Result 1532 states and 4667 transitions. [2021-07-09 17:41:12,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 17:41:12,532 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:12,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:12,534 INFO L225 Difference]: With dead ends: 1532 [2021-07-09 17:41:12,534 INFO L226 Difference]: Without dead ends: 1355 [2021-07-09 17:41:12,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 2780.9ms TimeCoverageRelationStatistics Valid=534, Invalid=3126, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 17:41:12,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-07-09 17:41:12,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 758. [2021-07-09 17:41:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.248348745046235) internal successors, (2459), 757 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2459 transitions. [2021-07-09 17:41:12,555 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2459 transitions. Word has length 23 [2021-07-09 17:41:12,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:12,555 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2459 transitions. [2021-07-09 17:41:12,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:12,555 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2459 transitions. [2021-07-09 17:41:12,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:12,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:12,556 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:12,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3363,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:12,773 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:12,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2146347564, now seen corresponding path program 220 times [2021-07-09 17:41:12,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:12,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971417280] [2021-07-09 17:41:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:12,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:12,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971417280] [2021-07-09 17:41:12,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971417280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:12,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091906610] [2021-07-09 17:41:12,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:12,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:12,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:12,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:41:12,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:13,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:13,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:13,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:13,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:13,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:13,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:13,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:13,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:13,137 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:13,138 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:13,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:13,141 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:13,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:13,144 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:13,147 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:13,147 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:13,234 INFO L628 ElimStorePlain]: treesize reduction 27, result has 78.6 percent of original size [2021-07-09 17:41:13,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:13,238 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:13,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:13,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:13,287 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:13,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:13,290 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:13,368 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.6 percent of original size [2021-07-09 17:41:13,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:13,371 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:13,425 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.4 percent of original size [2021-07-09 17:41:13,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:41:13,427 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:231, output treesize:45 [2021-07-09 17:41:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:13,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091906610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:13,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:13,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:41:13,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370340963] [2021-07-09 17:41:13,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:41:13,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:13,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:41:13,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:41:13,528 INFO L87 Difference]: Start difference. First operand 758 states and 2459 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:14,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:14,009 INFO L93 Difference]: Finished difference Result 1012 states and 3166 transitions. [2021-07-09 17:41:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:41:14,009 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:14,011 INFO L225 Difference]: With dead ends: 1012 [2021-07-09 17:41:14,011 INFO L226 Difference]: Without dead ends: 967 [2021-07-09 17:41:14,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:41:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-07-09 17:41:14,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 716. [2021-07-09 17:41:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 3.1706293706293707) internal successors, (2267), 715 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2267 transitions. [2021-07-09 17:41:14,020 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2267 transitions. Word has length 23 [2021-07-09 17:41:14,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:14,020 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 2267 transitions. [2021-07-09 17:41:14,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2267 transitions. [2021-07-09 17:41:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:14,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:14,021 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:14,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3414 [2021-07-09 17:41:14,237 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:14,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:14,237 INFO L82 PathProgramCache]: Analyzing trace with hash -554888474, now seen corresponding path program 221 times [2021-07-09 17:41:14,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:14,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547220154] [2021-07-09 17:41:14,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:14,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:14,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547220154] [2021-07-09 17:41:14,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547220154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:14,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053232089] [2021-07-09 17:41:14,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:14,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:14,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:14,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:41:14,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:14,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:14,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:14,641 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.2 percent of original size [2021-07-09 17:41:14,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:14,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:14,735 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-07-09 17:41:14,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:14,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:14,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:14,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:14,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:14,848 INFO L628 ElimStorePlain]: treesize reduction 21, result has 75.6 percent of original size [2021-07-09 17:41:14,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:41:14,850 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:107, output treesize:60 [2021-07-09 17:41:15,237 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_112, ends_with_10], 3=[ends_with_2]} [2021-07-09 17:41:15,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:15,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:15,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,250 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:15,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,522 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-07-09 17:41:15,522 INFO L628 ElimStorePlain]: treesize reduction 220, result has 53.8 percent of original size [2021-07-09 17:41:15,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:15,527 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:15,531 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:15,535 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:15,540 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:15,544 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:15,548 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:15,552 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,742 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-07-09 17:41:15,742 INFO L628 ElimStorePlain]: treesize reduction 28, result has 87.9 percent of original size [2021-07-09 17:41:15,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:15,746 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:15,751 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:15,755 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:15,759 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:15,763 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:15,767 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:15,921 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-07-09 17:41:15,922 INFO L628 ElimStorePlain]: treesize reduction 26, result has 85.6 percent of original size [2021-07-09 17:41:15,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:41:15,924 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 6 variables, input treesize:554, output treesize:93 [2021-07-09 17:41:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:16,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053232089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:16,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:16,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:41:16,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7344897] [2021-07-09 17:41:16,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:41:16,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:16,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:41:16,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:41:16,082 INFO L87 Difference]: Start difference. First operand 716 states and 2267 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:17,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:17,160 INFO L93 Difference]: Finished difference Result 1121 states and 3478 transitions. [2021-07-09 17:41:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:41:17,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:17,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:17,162 INFO L225 Difference]: With dead ends: 1121 [2021-07-09 17:41:17,162 INFO L226 Difference]: Without dead ends: 1031 [2021-07-09 17:41:17,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1069.5ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:41:17,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-07-09 17:41:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 726. [2021-07-09 17:41:17,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.169655172413793) internal successors, (2298), 725 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:17,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2298 transitions. [2021-07-09 17:41:17,171 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2298 transitions. Word has length 23 [2021-07-09 17:41:17,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:17,171 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2298 transitions. [2021-07-09 17:41:17,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:17,171 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2298 transitions. [2021-07-09 17:41:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:17,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:17,172 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:17,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3448,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:17,373 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:17,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:17,373 INFO L82 PathProgramCache]: Analyzing trace with hash 620602170, now seen corresponding path program 222 times [2021-07-09 17:41:17,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:17,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976501328] [2021-07-09 17:41:17,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:17,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:17,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976501328] [2021-07-09 17:41:17,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976501328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:17,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936239484] [2021-07-09 17:41:17,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:17,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:41:17,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:17,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:41:17,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:17,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:17,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:17,748 INFO L628 ElimStorePlain]: treesize reduction 28, result has 76.3 percent of original size [2021-07-09 17:41:17,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:17,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:17,808 INFO L628 ElimStorePlain]: treesize reduction 22, result has 74.4 percent of original size [2021-07-09 17:41:17,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_114 vanished before elimination [2021-07-09 17:41:17,808 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-07-09 17:41:17,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:17,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:17,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:17,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:41:17,838 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:122, output treesize:61 [2021-07-09 17:41:17,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:17,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:17,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:17,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:17,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:17,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:18,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:18,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:18,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:18,008 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:18,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:18,013 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:18,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:18,016 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:18,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:18,020 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:18,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:18,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:18,093 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:18,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:18,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:18,174 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:18,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:18,178 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:18,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:18,182 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:18,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:18,186 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:18,321 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-07-09 17:41:18,321 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.5 percent of original size [2021-07-09 17:41:18,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:18,329 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:18,436 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-07-09 17:41:18,436 INFO L628 ElimStorePlain]: treesize reduction 28, result has 81.5 percent of original size [2021-07-09 17:41:18,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:41:18,439 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 5 variables, input treesize:269, output treesize:98 [2021-07-09 17:41:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:18,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936239484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:18,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:18,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:41:18,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088610338] [2021-07-09 17:41:18,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:41:18,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:18,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:41:18,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:41:18,622 INFO L87 Difference]: Start difference. First operand 726 states and 2298 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:19,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:19,442 INFO L93 Difference]: Finished difference Result 1248 states and 3824 transitions. [2021-07-09 17:41:19,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:41:19,443 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:19,445 INFO L225 Difference]: With dead ends: 1248 [2021-07-09 17:41:19,445 INFO L226 Difference]: Without dead ends: 1158 [2021-07-09 17:41:19,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 890.7ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:41:19,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-07-09 17:41:19,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 736. [2021-07-09 17:41:19,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.182312925170068) internal successors, (2339), 735 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:19,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2339 transitions. [2021-07-09 17:41:19,455 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2339 transitions. Word has length 23 [2021-07-09 17:41:19,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:19,455 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2339 transitions. [2021-07-09 17:41:19,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:19,455 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2339 transitions. [2021-07-09 17:41:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:19,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:19,456 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:19,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3545 [2021-07-09 17:41:19,669 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:19,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:19,669 INFO L82 PathProgramCache]: Analyzing trace with hash -2060798392, now seen corresponding path program 223 times [2021-07-09 17:41:19,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:19,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174336247] [2021-07-09 17:41:19,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:19,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:19,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174336247] [2021-07-09 17:41:19,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174336247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:19,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301470999] [2021-07-09 17:41:19,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:20,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:41:20,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:20,392 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_119], 1=[ends_with_2]} [2021-07-09 17:41:20,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:20,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:20,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:20,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:20,462 INFO L628 ElimStorePlain]: treesize reduction 180, result has 28.3 percent of original size [2021-07-09 17:41:20,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:20,465 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:20,503 INFO L628 ElimStorePlain]: treesize reduction 24, result has 64.2 percent of original size [2021-07-09 17:41:20,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:20,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:20,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:20,509 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:20,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:20,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:20,524 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:278, output treesize:20 [2021-07-09 17:41:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:20,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301470999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:20,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:20,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-09 17:41:20,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809668743] [2021-07-09 17:41:20,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:41:20,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:20,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:41:20,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:41:20,586 INFO L87 Difference]: Start difference. First operand 736 states and 2339 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:22,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:22,600 INFO L93 Difference]: Finished difference Result 1116 states and 3361 transitions. [2021-07-09 17:41:22,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:41:22,600 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:22,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:22,602 INFO L225 Difference]: With dead ends: 1116 [2021-07-09 17:41:22,602 INFO L226 Difference]: Without dead ends: 1050 [2021-07-09 17:41:22,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1713.6ms TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:41:22,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-07-09 17:41:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 710. [2021-07-09 17:41:22,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 3.170662905500705) internal successors, (2248), 709 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:22,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2248 transitions. [2021-07-09 17:41:22,611 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2248 transitions. Word has length 23 [2021-07-09 17:41:22,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:22,611 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2248 transitions. [2021-07-09 17:41:22,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:22,611 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2248 transitions. [2021-07-09 17:41:22,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:22,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:22,612 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:22,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3582 [2021-07-09 17:41:22,829 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:22,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:22,829 INFO L82 PathProgramCache]: Analyzing trace with hash -973949894, now seen corresponding path program 224 times [2021-07-09 17:41:22,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:22,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838559535] [2021-07-09 17:41:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:22,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:22,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838559535] [2021-07-09 17:41:22,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838559535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:22,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405634162] [2021-07-09 17:41:22,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:23,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:23,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:23,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:41:23,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:23,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:23,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:23,182 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.8 percent of original size [2021-07-09 17:41:23,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:23,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:23,222 INFO L628 ElimStorePlain]: treesize reduction 24, result has 61.3 percent of original size [2021-07-09 17:41:23,222 INFO L518 ElimStorePlain]: Eliminatee v_prenex_120 vanished before elimination [2021-07-09 17:41:23,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:41:23,224 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:99, output treesize:33 [2021-07-09 17:41:23,418 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_122, v_prenex_124, v_prenex_123, ends_with_10], 1=[ends_with_2]} [2021-07-09 17:41:23,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:23,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:23,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:23,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:23,598 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-07-09 17:41:23,599 INFO L628 ElimStorePlain]: treesize reduction 79, result has 69.0 percent of original size [2021-07-09 17:41:23,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:23,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:23,763 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-07-09 17:41:23,763 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.7 percent of original size [2021-07-09 17:41:23,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:23,768 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:23,905 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-07-09 17:41:23,905 INFO L628 ElimStorePlain]: treesize reduction 25, result has 84.8 percent of original size [2021-07-09 17:41:23,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:23,910 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:23,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:23,913 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:24,035 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-07-09 17:41:24,036 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-07-09 17:41:24,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:24,040 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:24,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:24,043 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:24,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:24,047 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:24,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:24,050 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:24,137 INFO L628 ElimStorePlain]: treesize reduction 25, result has 78.4 percent of original size [2021-07-09 17:41:24,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:41:24,139 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:261, output treesize:57 [2021-07-09 17:41:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:24,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405634162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:24,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:24,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:41:24,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023172829] [2021-07-09 17:41:24,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:41:24,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:24,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:41:24,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:41:24,248 INFO L87 Difference]: Start difference. First operand 710 states and 2248 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:25,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:25,042 INFO L93 Difference]: Finished difference Result 1008 states and 3166 transitions. [2021-07-09 17:41:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:41:25,042 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:25,044 INFO L225 Difference]: With dead ends: 1008 [2021-07-09 17:41:25,044 INFO L226 Difference]: Without dead ends: 963 [2021-07-09 17:41:25,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 803.9ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:41:25,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-07-09 17:41:25,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 729. [2021-07-09 17:41:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.168956043956044) internal successors, (2307), 728 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:25,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2307 transitions. [2021-07-09 17:41:25,052 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2307 transitions. Word has length 23 [2021-07-09 17:41:25,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:25,052 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2307 transitions. [2021-07-09 17:41:25,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:25,053 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2307 transitions. [2021-07-09 17:41:25,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:25,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:25,053 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:25,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-07-09 17:41:25,270 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:25,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:25,270 INFO L82 PathProgramCache]: Analyzing trace with hash -25680630, now seen corresponding path program 225 times [2021-07-09 17:41:25,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:25,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570871809] [2021-07-09 17:41:25,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:25,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:25,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570871809] [2021-07-09 17:41:25,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570871809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:25,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247530684] [2021-07-09 17:41:25,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:25,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:41:25,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:25,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:41:25,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:25,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:25,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:25,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:25,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:25,609 INFO L628 ElimStorePlain]: treesize reduction 26, result has 76.6 percent of original size [2021-07-09 17:41:25,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:25,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:25,667 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.5 percent of original size [2021-07-09 17:41:25,667 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-07-09 17:41:25,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:25,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:25,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:25,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:41:25,697 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:117, output treesize:58 [2021-07-09 17:41:25,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:25,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:25,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:25,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:25,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:25,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:25,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:25,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:25,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:25,859 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:25,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:25,863 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:25,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:25,867 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:25,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:25,871 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:25,874 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:25,874 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:25,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:25,878 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:26,031 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-07-09 17:41:26,032 INFO L628 ElimStorePlain]: treesize reduction 99, result has 64.0 percent of original size [2021-07-09 17:41:26,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:26,036 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:26,162 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-07-09 17:41:26,162 INFO L628 ElimStorePlain]: treesize reduction 33, result has 80.9 percent of original size [2021-07-09 17:41:26,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:26,166 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:26,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:26,170 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:26,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:26,173 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:26,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:26,177 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:26,280 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-07-09 17:41:26,280 INFO L628 ElimStorePlain]: treesize reduction 3, result has 97.6 percent of original size [2021-07-09 17:41:26,280 INFO L518 ElimStorePlain]: Eliminatee v_prenex_129 vanished before elimination [2021-07-09 17:41:26,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:41:26,282 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 5 variables, input treesize:341, output treesize:98 [2021-07-09 17:41:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:26,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247530684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:26,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:26,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:41:26,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979947981] [2021-07-09 17:41:26,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:41:26,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:26,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:41:26,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:41:26,455 INFO L87 Difference]: Start difference. First operand 729 states and 2307 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:27,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:27,457 INFO L93 Difference]: Finished difference Result 1261 states and 3863 transitions. [2021-07-09 17:41:27,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:41:27,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:27,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:27,460 INFO L225 Difference]: With dead ends: 1261 [2021-07-09 17:41:27,460 INFO L226 Difference]: Without dead ends: 1171 [2021-07-09 17:41:27,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 965.9ms TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:41:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-07-09 17:41:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 739. [2021-07-09 17:41:27,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.1815718157181574) internal successors, (2348), 738 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2348 transitions. [2021-07-09 17:41:27,469 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2348 transitions. Word has length 23 [2021-07-09 17:41:27,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:27,469 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2348 transitions. [2021-07-09 17:41:27,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:27,470 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2348 transitions. [2021-07-09 17:41:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:27,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:27,470 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:27,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3713,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:27,678 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:27,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:27,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1587886104, now seen corresponding path program 226 times [2021-07-09 17:41:27,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:27,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144461055] [2021-07-09 17:41:27,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:27,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:27,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144461055] [2021-07-09 17:41:27,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144461055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:27,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253998284] [2021-07-09 17:41:27,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:27,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:27,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:27,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:41:27,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:28,269 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_2, v_prenex_131, v_prenex_130], 1=[ends_with_6]} [2021-07-09 17:41:28,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:28,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:28,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:28,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:28,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:28,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:28,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:28,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:28,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:28,285 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:28,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:28,288 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:28,357 INFO L628 ElimStorePlain]: treesize reduction 117, result has 38.4 percent of original size [2021-07-09 17:41:28,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:28,361 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:28,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:28,387 INFO L518 ElimStorePlain]: Eliminatee v_prenex_130 vanished before elimination [2021-07-09 17:41:28,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:28,390 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:28,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:28,393 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:28,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:28,395 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:28,437 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.3 percent of original size [2021-07-09 17:41:28,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:41:28,438 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:293, output treesize:32 [2021-07-09 17:41:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:28,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253998284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:28,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:28,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 17:41:28,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465010075] [2021-07-09 17:41:28,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:41:28,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:28,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:41:28,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:41:28,502 INFO L87 Difference]: Start difference. First operand 739 states and 2348 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:29,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:29,437 INFO L93 Difference]: Finished difference Result 1121 states and 3462 transitions. [2021-07-09 17:41:29,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:41:29,437 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:29,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:29,439 INFO L225 Difference]: With dead ends: 1121 [2021-07-09 17:41:29,439 INFO L226 Difference]: Without dead ends: 1067 [2021-07-09 17:41:29,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 991.8ms TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:41:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-07-09 17:41:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 751. [2021-07-09 17:41:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.1973333333333334) internal successors, (2398), 750 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:29,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2398 transitions. [2021-07-09 17:41:29,448 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2398 transitions. Word has length 23 [2021-07-09 17:41:29,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:29,448 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2398 transitions. [2021-07-09 17:41:29,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:29,448 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2398 transitions. [2021-07-09 17:41:29,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:29,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:29,449 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:29,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3750,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:29,666 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:29,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1571783644, now seen corresponding path program 227 times [2021-07-09 17:41:29,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:29,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308590497] [2021-07-09 17:41:29,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:29,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:29,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308590497] [2021-07-09 17:41:29,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308590497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:29,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765501269] [2021-07-09 17:41:29,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:30,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:41:30,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:30,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:41:30,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:30,298 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_133, v_prenex_132, ends_with_6], 1=[ends_with_2]} [2021-07-09 17:41:30,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:30,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:30,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:30,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:30,395 INFO L628 ElimStorePlain]: treesize reduction 110, result has 47.4 percent of original size [2021-07-09 17:41:30,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:30,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:30,462 INFO L628 ElimStorePlain]: treesize reduction 24, result has 74.7 percent of original size [2021-07-09 17:41:30,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:30,465 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:30,504 INFO L628 ElimStorePlain]: treesize reduction 25, result has 63.2 percent of original size [2021-07-09 17:41:30,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:30,508 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:30,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:30,511 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:30,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:30,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:30,526 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:217, output treesize:20 [2021-07-09 17:41:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:30,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765501269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:30,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:30,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-09 17:41:30,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544235870] [2021-07-09 17:41:30,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:41:30,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:30,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:41:30,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:41:30,590 INFO L87 Difference]: Start difference. First operand 751 states and 2398 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:33,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:33,351 INFO L93 Difference]: Finished difference Result 1322 states and 4005 transitions. [2021-07-09 17:41:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 17:41:33,351 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:33,353 INFO L225 Difference]: With dead ends: 1322 [2021-07-09 17:41:33,353 INFO L226 Difference]: Without dead ends: 1229 [2021-07-09 17:41:33,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2376.8ms TimeCoverageRelationStatistics Valid=432, Invalid=3108, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:41:33,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-07-09 17:41:33,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 750. [2021-07-09 17:41:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.184245660881175) internal successors, (2385), 749 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2385 transitions. [2021-07-09 17:41:33,363 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2385 transitions. Word has length 23 [2021-07-09 17:41:33,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:33,363 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2385 transitions. [2021-07-09 17:41:33,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:33,363 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2385 transitions. [2021-07-09 17:41:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:33,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:33,364 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:33,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3798,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:33,580 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:33,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:33,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1840314058, now seen corresponding path program 228 times [2021-07-09 17:41:33,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:33,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139802568] [2021-07-09 17:41:33,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:33,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:33,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139802568] [2021-07-09 17:41:33,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139802568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:33,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757411186] [2021-07-09 17:41:33,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:33,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:41:33,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:33,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:41:33,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:34,303 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_134, ends_with_6], 1=[ends_with_2]} [2021-07-09 17:41:34,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:34,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:34,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:34,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:34,313 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:34,313 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:34,435 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-07-09 17:41:34,436 INFO L628 ElimStorePlain]: treesize reduction 187, result has 43.7 percent of original size [2021-07-09 17:41:34,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:34,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:34,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:34,442 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:34,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:34,445 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:34,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:34,448 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:34,542 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-07-09 17:41:34,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:34,545 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:34,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:34,548 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:34,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:34,551 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:34,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:34,554 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:34,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:34,557 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:34,635 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-07-09 17:41:34,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:41:34,636 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:395, output treesize:65 [2021-07-09 17:41:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:34,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757411186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:34,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:34,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-09 17:41:34,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364397860] [2021-07-09 17:41:34,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:41:34,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:34,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:41:34,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:41:34,749 INFO L87 Difference]: Start difference. First operand 750 states and 2385 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:36,703 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-07-09 17:41:37,933 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-07-09 17:41:38,547 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-07-09 17:41:38,997 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-07-09 17:41:39,155 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-07-09 17:41:39,300 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-07-09 17:41:39,498 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-07-09 17:41:39,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:39,850 INFO L93 Difference]: Finished difference Result 1854 states and 5388 transitions. [2021-07-09 17:41:39,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 17:41:39,850 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:39,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:39,853 INFO L225 Difference]: With dead ends: 1854 [2021-07-09 17:41:39,853 INFO L226 Difference]: Without dead ends: 1620 [2021-07-09 17:41:39,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 4418.0ms TimeCoverageRelationStatistics Valid=659, Invalid=5041, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 17:41:39,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-07-09 17:41:39,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 812. [2021-07-09 17:41:39,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.256473489519112) internal successors, (2641), 811 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:39,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2641 transitions. [2021-07-09 17:41:39,866 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2641 transitions. Word has length 23 [2021-07-09 17:41:39,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:39,866 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2641 transitions. [2021-07-09 17:41:39,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:39,866 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2641 transitions. [2021-07-09 17:41:39,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:39,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:39,867 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:40,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3835 [2021-07-09 17:41:40,082 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:40,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:40,082 INFO L82 PathProgramCache]: Analyzing trace with hash -335500874, now seen corresponding path program 229 times [2021-07-09 17:41:40,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:40,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237169426] [2021-07-09 17:41:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:40,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:40,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237169426] [2021-07-09 17:41:40,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237169426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:40,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955048584] [2021-07-09 17:41:40,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:40,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:41:40,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:40,797 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_135, ends_with_6], 1=[ends_with_2]} [2021-07-09 17:41:40,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:40,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:40,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:40,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:40,873 INFO L628 ElimStorePlain]: treesize reduction 239, result has 22.9 percent of original size [2021-07-09 17:41:40,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:40,876 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:40,915 INFO L628 ElimStorePlain]: treesize reduction 24, result has 64.2 percent of original size [2021-07-09 17:41:40,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:40,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:40,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:40,921 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:40,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:40,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:41:40,937 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:337, output treesize:20 [2021-07-09 17:41:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:40,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955048584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:40,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:40,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-09 17:41:40,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337034838] [2021-07-09 17:41:40,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:41:40,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:40,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:41:40,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:41:40,996 INFO L87 Difference]: Start difference. First operand 812 states and 2641 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:42,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:42,500 INFO L93 Difference]: Finished difference Result 1104 states and 3428 transitions. [2021-07-09 17:41:42,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:41:42,500 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:42,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:42,502 INFO L225 Difference]: With dead ends: 1104 [2021-07-09 17:41:42,502 INFO L226 Difference]: Without dead ends: 1044 [2021-07-09 17:41:42,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1227.1ms TimeCoverageRelationStatistics Valid=209, Invalid=1597, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:41:42,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-07-09 17:41:42,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 828. [2021-07-09 17:41:42,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.259975816203144) internal successors, (2696), 827 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:42,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2696 transitions. [2021-07-09 17:41:42,513 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2696 transitions. Word has length 23 [2021-07-09 17:41:42,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:42,513 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2696 transitions. [2021-07-09 17:41:42,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:42,513 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2696 transitions. [2021-07-09 17:41:42,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:42,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:42,514 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:42,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3953 [2021-07-09 17:41:42,721 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:42,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:42,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1570469962, now seen corresponding path program 230 times [2021-07-09 17:41:42,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:42,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080617872] [2021-07-09 17:41:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:42,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:42,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080617872] [2021-07-09 17:41:42,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080617872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:42,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138080563] [2021-07-09 17:41:42,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:42,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:41:42,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:42,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:41:42,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:43,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:43,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:43,093 INFO L628 ElimStorePlain]: treesize reduction 28, result has 78.8 percent of original size [2021-07-09 17:41:43,093 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-07-09 17:41:43,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:43,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:43,166 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-07-09 17:41:43,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:43,169 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:43,222 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.3 percent of original size [2021-07-09 17:41:43,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:43,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:43,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:43,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:41:43,252 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:135, output treesize:59 [2021-07-09 17:41:43,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:43,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:43,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:41:43,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:43,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:43,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:43,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:41:43,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:43,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:43,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:43,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:43,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:41:43,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:43,758 INFO L628 ElimStorePlain]: treesize reduction 104, result has 50.0 percent of original size [2021-07-09 17:41:43,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:43,762 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:43,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:43,765 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:43,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:43,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:41:43,810 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:309, output treesize:70 [2021-07-09 17:41:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:41:43,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138080563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:43,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:43,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:41:43,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054276640] [2021-07-09 17:41:43,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:41:43,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:43,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:41:43,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:41:43,967 INFO L87 Difference]: Start difference. First operand 828 states and 2696 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:45,638 INFO L93 Difference]: Finished difference Result 1373 states and 4181 transitions. [2021-07-09 17:41:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:41:45,638 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:45,641 INFO L225 Difference]: With dead ends: 1373 [2021-07-09 17:41:45,641 INFO L226 Difference]: Without dead ends: 1225 [2021-07-09 17:41:45,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1323.1ms TimeCoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:41:45,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-07-09 17:41:45,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 850. [2021-07-09 17:41:45,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.270906949352179) internal successors, (2777), 849 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2777 transitions. [2021-07-09 17:41:45,652 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2777 transitions. Word has length 23 [2021-07-09 17:41:45,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:45,652 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2777 transitions. [2021-07-09 17:41:45,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:45,652 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2777 transitions. [2021-07-09 17:41:45,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:45,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:45,653 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:45,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:45,854 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:45,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1231172060, now seen corresponding path program 231 times [2021-07-09 17:41:45,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:45,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671928408] [2021-07-09 17:41:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:46,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:46,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671928408] [2021-07-09 17:41:46,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671928408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:46,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287033512] [2021-07-09 17:41:46,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:46,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:41:46,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:46,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:41:46,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:46,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:46,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:46,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:46,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:46,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:46,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:46,272 INFO L628 ElimStorePlain]: treesize reduction 10, result has 90.9 percent of original size [2021-07-09 17:41:46,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:46,275 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:46,318 INFO L628 ElimStorePlain]: treesize reduction 41, result has 57.7 percent of original size [2021-07-09 17:41:46,318 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-07-09 17:41:46,318 INFO L518 ElimStorePlain]: Eliminatee v_prenex_142 vanished before elimination [2021-07-09 17:41:46,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:41:46,320 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:144, output treesize:48 [2021-07-09 17:41:46,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:46,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:46,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:41:46,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:46,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:46,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:46,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:41:46,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:46,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:46,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:46,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:41:46,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:46,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:46,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:46,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:41:46,622 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:46,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:46,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:41:46,626 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:46,675 INFO L628 ElimStorePlain]: treesize reduction 45, result has 55.9 percent of original size [2021-07-09 17:41:46,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:41:46,676 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:178, output treesize:41 [2021-07-09 17:41:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:41:46,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287033512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:46,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:46,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 17:41:46,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269204516] [2021-07-09 17:41:46,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:41:46,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:46,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:41:46,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:41:46,745 INFO L87 Difference]: Start difference. First operand 850 states and 2777 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:47,691 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-07-09 17:41:48,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:48,247 INFO L93 Difference]: Finished difference Result 1420 states and 4421 transitions. [2021-07-09 17:41:48,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:41:48,248 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:48,250 INFO L225 Difference]: With dead ends: 1420 [2021-07-09 17:41:48,250 INFO L226 Difference]: Without dead ends: 1359 [2021-07-09 17:41:48,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1561.9ms TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:41:48,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-07-09 17:41:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 871. [2021-07-09 17:41:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.264367816091954) internal successors, (2840), 870 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:48,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2840 transitions. [2021-07-09 17:41:48,262 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2840 transitions. Word has length 23 [2021-07-09 17:41:48,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:48,262 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2840 transitions. [2021-07-09 17:41:48,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:48,262 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2840 transitions. [2021-07-09 17:41:48,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:48,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:48,263 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:48,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4186 [2021-07-09 17:41:48,479 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:48,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:48,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1298345444, now seen corresponding path program 232 times [2021-07-09 17:41:48,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:48,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757155679] [2021-07-09 17:41:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:48,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:48,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757155679] [2021-07-09 17:41:48,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757155679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:48,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995109979] [2021-07-09 17:41:48,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:48,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:41:48,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:48,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:41:48,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:48,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:48,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:48,833 INFO L628 ElimStorePlain]: treesize reduction 74, result has 47.5 percent of original size [2021-07-09 17:41:48,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:48,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:48,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:48,839 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:48,887 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.3 percent of original size [2021-07-09 17:41:48,887 INFO L518 ElimStorePlain]: Eliminatee v_prenex_147 vanished before elimination [2021-07-09 17:41:48,887 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-07-09 17:41:48,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:41:48,889 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:144, output treesize:48 [2021-07-09 17:41:49,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:49,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:49,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:41:49,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:49,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:49,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:49,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:41:49,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:49,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:49,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:49,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:41:49,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:49,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:49,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:41:49,455 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:49,595 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-07-09 17:41:49,595 INFO L628 ElimStorePlain]: treesize reduction 105, result has 54.1 percent of original size [2021-07-09 17:41:49,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:49,600 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:49,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:49,603 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:49,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:49,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:41:49,668 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:301, output treesize:80 [2021-07-09 17:41:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:41:49,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995109979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:49,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:49,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 17:41:49,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533579965] [2021-07-09 17:41:49,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:41:49,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:49,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:41:49,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:41:49,825 INFO L87 Difference]: Start difference. First operand 871 states and 2840 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:50,991 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-07-09 17:41:51,941 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-07-09 17:41:52,676 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-07-09 17:41:52,810 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-07-09 17:41:52,951 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-07-09 17:41:53,492 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-07-09 17:41:53,638 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-07-09 17:41:53,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:53,663 INFO L93 Difference]: Finished difference Result 1820 states and 5668 transitions. [2021-07-09 17:41:53,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 17:41:53,663 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:53,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:53,666 INFO L225 Difference]: With dead ends: 1820 [2021-07-09 17:41:53,666 INFO L226 Difference]: Without dead ends: 1637 [2021-07-09 17:41:53,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 3605.0ms TimeCoverageRelationStatistics Valid=624, Invalid=2916, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:41:53,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-07-09 17:41:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 881. [2021-07-09 17:41:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.2738636363636364) internal successors, (2881), 880 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2881 transitions. [2021-07-09 17:41:53,679 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2881 transitions. Word has length 23 [2021-07-09 17:41:53,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:53,679 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 2881 transitions. [2021-07-09 17:41:53,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:53,679 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2881 transitions. [2021-07-09 17:41:53,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:53,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:53,680 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:53,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4249,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:53,896 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:53,897 INFO L82 PathProgramCache]: Analyzing trace with hash -101275790, now seen corresponding path program 233 times [2021-07-09 17:41:53,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:53,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672990595] [2021-07-09 17:41:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:53,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:53,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672990595] [2021-07-09 17:41:53,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672990595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:53,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147712056] [2021-07-09 17:41:53,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:54,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:41:54,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:54,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:41:54,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:54,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:54,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:54,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:54,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:54,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:54,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:54,198 INFO L628 ElimStorePlain]: treesize reduction 24, result has 78.4 percent of original size [2021-07-09 17:41:54,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:54,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:54,244 INFO L628 ElimStorePlain]: treesize reduction 22, result has 73.5 percent of original size [2021-07-09 17:41:54,244 INFO L518 ElimStorePlain]: Eliminatee v_prenex_152 vanished before elimination [2021-07-09 17:41:54,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-07-09 17:41:54,246 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:122, output treesize:61 [2021-07-09 17:41:54,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:54,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:54,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:41:54,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:54,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:54,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:54,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:41:54,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:54,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:54,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:54,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:41:54,536 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:54,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:41:54,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:41:54,540 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:54,593 INFO L628 ElimStorePlain]: treesize reduction 79, result has 42.3 percent of original size [2021-07-09 17:41:54,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:54,596 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:54,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:54,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:41:54,618 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:207, output treesize:33 [2021-07-09 17:41:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:54,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147712056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:54,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:54,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:41:54,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100298650] [2021-07-09 17:41:54,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:41:54,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:54,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:41:54,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:41:54,673 INFO L87 Difference]: Start difference. First operand 881 states and 2881 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:55,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:41:55,112 INFO L93 Difference]: Finished difference Result 1350 states and 4249 transitions. [2021-07-09 17:41:55,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:41:55,112 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:41:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:41:55,115 INFO L225 Difference]: With dead ends: 1350 [2021-07-09 17:41:55,115 INFO L226 Difference]: Without dead ends: 1305 [2021-07-09 17:41:55,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 510.7ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:41:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-07-09 17:41:55,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 896. [2021-07-09 17:41:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.275977653631285) internal successors, (2932), 895 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2932 transitions. [2021-07-09 17:41:55,127 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2932 transitions. Word has length 23 [2021-07-09 17:41:55,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:41:55,127 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2932 transitions. [2021-07-09 17:41:55,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2932 transitions. [2021-07-09 17:41:55,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:41:55,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:41:55,128 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:41:55,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4395 [2021-07-09 17:41:55,345 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:41:55,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:41:55,345 INFO L82 PathProgramCache]: Analyzing trace with hash 54833778, now seen corresponding path program 234 times [2021-07-09 17:41:55,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:41:55,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986949404] [2021-07-09 17:41:55,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:41:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:41:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:41:55,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:41:55,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986949404] [2021-07-09 17:41:55,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986949404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:55,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820796557] [2021-07-09 17:41:55,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:41:55,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:41:55,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:41:55,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:41:55,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:41:56,043 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_156, ends_with_10], 1=[ends_with_6]} [2021-07-09 17:41:56,047 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:56,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:56,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:56,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:56,059 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:56,063 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:56,067 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:56,070 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:56,074 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:56,077 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:56,080 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:56,089 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:56,093 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,096 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:56,096 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,099 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:41:56,100 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:56,103 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,216 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-07-09 17:41:56,216 INFO L628 ElimStorePlain]: treesize reduction 135, result has 46.9 percent of original size [2021-07-09 17:41:56,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:56,220 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:41:56,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:41:56,272 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:56,276 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:41:56,279 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:41:56,329 INFO L628 ElimStorePlain]: treesize reduction 46, result has 56.2 percent of original size [2021-07-09 17:41:56,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:41:56,330 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 4 variables, input treesize:581, output treesize:35 [2021-07-09 17:41:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:41:56,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820796557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:41:56,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:41:56,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-09 17:41:56,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125860559] [2021-07-09 17:41:56,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:41:56,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:41:56,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:41:56,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:41:56,430 INFO L87 Difference]: Start difference. First operand 896 states and 2932 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:41:56,612 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-07-09 17:41:56,766 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-09 17:41:56,896 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-07-09 17:41:57,069 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-07-09 17:41:57,255 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-07-09 17:41:57,700 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-07-09 17:41:58,169 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-07-09 17:41:58,301 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-07-09 17:41:59,779 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-07-09 17:42:00,375 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-07-09 17:42:01,020 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-07-09 17:42:01,789 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-07-09 17:42:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:01,798 INFO L93 Difference]: Finished difference Result 2106 states and 6396 transitions. [2021-07-09 17:42:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 17:42:01,798 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:01,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:01,801 INFO L225 Difference]: With dead ends: 2106 [2021-07-09 17:42:01,801 INFO L226 Difference]: Without dead ends: 1979 [2021-07-09 17:42:01,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 4796.6ms TimeCoverageRelationStatistics Valid=787, Invalid=5533, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 17:42:01,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-07-09 17:42:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 944. [2021-07-09 17:42:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 3.291622481442206) internal successors, (3104), 943 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:01,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 3104 transitions. [2021-07-09 17:42:01,817 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 3104 transitions. Word has length 23 [2021-07-09 17:42:01,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:01,817 INFO L482 AbstractCegarLoop]: Abstraction has 944 states and 3104 transitions. [2021-07-09 17:42:01,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 3104 transitions. [2021-07-09 17:42:01,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:01,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:01,819 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:02,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4484,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:02,036 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:02,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:02,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1457185666, now seen corresponding path program 235 times [2021-07-09 17:42:02,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:02,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546123680] [2021-07-09 17:42:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:02,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:02,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546123680] [2021-07-09 17:42:02,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546123680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:02,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472912536] [2021-07-09 17:42:02,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:02,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:42:02,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:02,644 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_157, v_prenex_159, v_prenex_158, ends_with_10], 1=[ends_with_6]} [2021-07-09 17:42:02,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:02,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:02,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:42:02,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:02,730 INFO L628 ElimStorePlain]: treesize reduction 178, result has 31.0 percent of original size [2021-07-09 17:42:02,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:02,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:02,800 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.7 percent of original size [2021-07-09 17:42:02,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:02,803 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:02,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:02,835 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-07-09 17:42:02,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:02,838 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:02,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:02,841 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:02,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:02,844 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:02,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:02,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:42:02,871 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:288, output treesize:35 [2021-07-09 17:42:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:42:02,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472912536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:02,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:02,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-09 17:42:02,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525867223] [2021-07-09 17:42:02,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:42:02,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:02,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:42:02,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:02,938 INFO L87 Difference]: Start difference. First operand 944 states and 3104 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:04,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:04,394 INFO L93 Difference]: Finished difference Result 1399 states and 4433 transitions. [2021-07-09 17:42:04,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:42:04,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:04,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:04,397 INFO L225 Difference]: With dead ends: 1399 [2021-07-09 17:42:04,397 INFO L226 Difference]: Without dead ends: 1345 [2021-07-09 17:42:04,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1276.2ms TimeCoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:42:04,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-07-09 17:42:04,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 928. [2021-07-09 17:42:04,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.2837108953613807) internal successors, (3044), 927 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3044 transitions. [2021-07-09 17:42:04,408 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3044 transitions. Word has length 23 [2021-07-09 17:42:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:04,408 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3044 transitions. [2021-07-09 17:42:04,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:04,408 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3044 transitions. [2021-07-09 17:42:04,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:04,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:04,410 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:04,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4563 [2021-07-09 17:42:04,626 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:04,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:04,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1635109126, now seen corresponding path program 236 times [2021-07-09 17:42:04,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:04,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329630363] [2021-07-09 17:42:04,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:04,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:04,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329630363] [2021-07-09 17:42:04,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329630363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:04,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693467869] [2021-07-09 17:42:04,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:04,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:04,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:04,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:42:04,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:05,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693467869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:05,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:05,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:42:05,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225385177] [2021-07-09 17:42:05,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:42:05,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:05,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:42:05,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:42:05,074 INFO L87 Difference]: Start difference. First operand 928 states and 3044 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:05,940 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-07-09 17:42:06,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:06,149 INFO L93 Difference]: Finished difference Result 1707 states and 5349 transitions. [2021-07-09 17:42:06,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:42:06,149 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:06,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:06,152 INFO L225 Difference]: With dead ends: 1707 [2021-07-09 17:42:06,152 INFO L226 Difference]: Without dead ends: 1617 [2021-07-09 17:42:06,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1102.3ms TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:42:06,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-07-09 17:42:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 952. [2021-07-09 17:42:06,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 3.305993690851735) internal successors, (3144), 951 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3144 transitions. [2021-07-09 17:42:06,166 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3144 transitions. Word has length 23 [2021-07-09 17:42:06,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:06,166 INFO L482 AbstractCegarLoop]: Abstraction has 952 states and 3144 transitions. [2021-07-09 17:42:06,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:06,166 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3144 transitions. [2021-07-09 17:42:06,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:06,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:06,167 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:06,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4617,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:06,374 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:06,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:06,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2049337868, now seen corresponding path program 237 times [2021-07-09 17:42:06,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:06,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152504175] [2021-07-09 17:42:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:06,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:06,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152504175] [2021-07-09 17:42:06,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152504175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:06,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880559521] [2021-07-09 17:42:06,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:06,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:42:06,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:06,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:42:06,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:06,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:06,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:06,776 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.8 percent of original size [2021-07-09 17:42:06,776 INFO L518 ElimStorePlain]: Eliminatee v_prenex_160 vanished before elimination [2021-07-09 17:42:06,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:06,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:06,813 INFO L628 ElimStorePlain]: treesize reduction 24, result has 61.3 percent of original size [2021-07-09 17:42:06,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:42:06,814 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:99, output treesize:30 [2021-07-09 17:42:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:42:07,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880559521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:07,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:07,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-09 17:42:07,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230810795] [2021-07-09 17:42:07,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:42:07,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:07,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:42:07,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:42:07,099 INFO L87 Difference]: Start difference. First operand 952 states and 3144 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:07,988 INFO L93 Difference]: Finished difference Result 1367 states and 4382 transitions. [2021-07-09 17:42:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:42:07,988 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:07,990 INFO L225 Difference]: With dead ends: 1367 [2021-07-09 17:42:07,990 INFO L226 Difference]: Without dead ends: 1313 [2021-07-09 17:42:07,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 777.4ms TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:42:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-07-09 17:42:08,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 974. [2021-07-09 17:42:08,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 3.3072970195272355) internal successors, (3218), 973 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:08,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 3218 transitions. [2021-07-09 17:42:08,002 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 3218 transitions. Word has length 23 [2021-07-09 17:42:08,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:08,002 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 3218 transitions. [2021-07-09 17:42:08,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:08,002 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 3218 transitions. [2021-07-09 17:42:08,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:08,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:08,004 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:08,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4631,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:08,220 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:08,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:08,220 INFO L82 PathProgramCache]: Analyzing trace with hash -344567604, now seen corresponding path program 238 times [2021-07-09 17:42:08,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:08,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583810449] [2021-07-09 17:42:08,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:08,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:08,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583810449] [2021-07-09 17:42:08,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583810449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:08,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460616878] [2021-07-09 17:42:08,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:08,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:08,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:08,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:42:08,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:08,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:08,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:08,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:08,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:08,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:08,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:08,562 INFO L628 ElimStorePlain]: treesize reduction 24, result has 78.4 percent of original size [2021-07-09 17:42:08,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:08,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:08,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:08,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:08,603 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:08,657 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-07-09 17:42:08,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-07-09 17:42:08,659 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:122, output treesize:61 [2021-07-09 17:42:08,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:08,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:08,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:42:08,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:08,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:08,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:08,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:42:08,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:08,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:08,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:08,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:42:08,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:08,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:08,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:42:08,971 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:09,036 INFO L628 ElimStorePlain]: treesize reduction 84, result has 42.9 percent of original size [2021-07-09 17:42:09,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:09,040 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:09,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:09,043 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:09,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:09,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:42:09,069 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:209, output treesize:33 [2021-07-09 17:42:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:09,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460616878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:09,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:09,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:42:09,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232754199] [2021-07-09 17:42:09,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:42:09,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:09,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:42:09,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:42:09,134 INFO L87 Difference]: Start difference. First operand 974 states and 3218 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:09,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:09,758 INFO L93 Difference]: Finished difference Result 1750 states and 5441 transitions. [2021-07-09 17:42:09,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:42:09,758 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:09,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:09,761 INFO L225 Difference]: With dead ends: 1750 [2021-07-09 17:42:09,761 INFO L226 Difference]: Without dead ends: 1627 [2021-07-09 17:42:09,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 687.1ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:42:09,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-07-09 17:42:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 992. [2021-07-09 17:42:09,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.2986881937436934) internal successors, (3269), 991 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:09,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3269 transitions. [2021-07-09 17:42:09,775 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3269 transitions. Word has length 23 [2021-07-09 17:42:09,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:09,775 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3269 transitions. [2021-07-09 17:42:09,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:09,776 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3269 transitions. [2021-07-09 17:42:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:09,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:09,777 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:09,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4687,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:09,992 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:09,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:09,992 INFO L82 PathProgramCache]: Analyzing trace with hash -545544782, now seen corresponding path program 239 times [2021-07-09 17:42:09,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:09,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035408884] [2021-07-09 17:42:09,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:42:10,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:10,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035408884] [2021-07-09 17:42:10,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035408884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:10,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851664027] [2021-07-09 17:42:10,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:10,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:42:10,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:10,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:42:10,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:10,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:10,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:10,277 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.7 percent of original size [2021-07-09 17:42:10,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:10,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:10,339 INFO L628 ElimStorePlain]: treesize reduction 19, result has 77.4 percent of original size [2021-07-09 17:42:10,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:10,342 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:10,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:10,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:10,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:10,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:10,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:42:10,402 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:95, output treesize:53 [2021-07-09 17:42:10,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:10,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:10,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:10,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:10,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:42:10,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:10,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:10,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:42:10,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:10,729 INFO L628 ElimStorePlain]: treesize reduction 20, result has 56.5 percent of original size [2021-07-09 17:42:10,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:42:10,730 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:77, output treesize:20 [2021-07-09 17:42:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:42:10,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851664027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:10,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:10,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:42:10,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520748330] [2021-07-09 17:42:10,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:42:10,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:10,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:42:10,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:42:10,777 INFO L87 Difference]: Start difference. First operand 992 states and 3269 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:11,055 INFO L93 Difference]: Finished difference Result 1547 states and 4889 transitions. [2021-07-09 17:42:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:42:11,055 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:11,058 INFO L225 Difference]: With dead ends: 1547 [2021-07-09 17:42:11,058 INFO L226 Difference]: Without dead ends: 1502 [2021-07-09 17:42:11,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 377.0ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:42:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-07-09 17:42:11,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 992. [2021-07-09 17:42:11,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.2986881937436934) internal successors, (3269), 991 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:11,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3269 transitions. [2021-07-09 17:42:11,071 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3269 transitions. Word has length 23 [2021-07-09 17:42:11,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:11,071 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3269 transitions. [2021-07-09 17:42:11,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:11,072 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3269 transitions. [2021-07-09 17:42:11,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:11,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:11,073 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:11,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4734,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:11,289 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:11,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:11,289 INFO L82 PathProgramCache]: Analyzing trace with hash 191678748, now seen corresponding path program 240 times [2021-07-09 17:42:11,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:11,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062554834] [2021-07-09 17:42:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:11,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:11,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062554834] [2021-07-09 17:42:11,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062554834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:11,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927667084] [2021-07-09 17:42:11,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:11,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:42:11,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:11,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:42:11,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:11,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:11,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:11,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:11,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:11,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:11,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:11,677 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:42:11,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:11,723 INFO L628 ElimStorePlain]: treesize reduction 54, result has 53.0 percent of original size [2021-07-09 17:42:11,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:11,725 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:11,753 INFO L628 ElimStorePlain]: treesize reduction 20, result has 65.5 percent of original size [2021-07-09 17:42:11,753 INFO L518 ElimStorePlain]: Eliminatee v_prenex_172 vanished before elimination [2021-07-09 17:42:11,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:42:11,755 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:154, output treesize:30 [2021-07-09 17:42:11,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:42:11,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:11,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:42:11,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:11,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:42:11,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:11,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:11,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:42:11,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:12,037 INFO L628 ElimStorePlain]: treesize reduction 32, result has 66.3 percent of original size [2021-07-09 17:42:12,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:42:12,038 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:163, output treesize:47 [2021-07-09 17:42:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:42:12,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927667084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:12,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:12,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-09 17:42:12,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215999964] [2021-07-09 17:42:12,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:42:12,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:12,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:42:12,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:12,155 INFO L87 Difference]: Start difference. First operand 992 states and 3269 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:12,278 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-07-09 17:42:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:14,938 INFO L93 Difference]: Finished difference Result 1786 states and 5586 transitions. [2021-07-09 17:42:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 17:42:14,938 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:14,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:14,941 INFO L225 Difference]: With dead ends: 1786 [2021-07-09 17:42:14,941 INFO L226 Difference]: Without dead ends: 1628 [2021-07-09 17:42:14,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2439.5ms TimeCoverageRelationStatistics Valid=393, Invalid=2469, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:42:14,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-07-09 17:42:14,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1009. [2021-07-09 17:42:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 3.3055555555555554) internal successors, (3332), 1008 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 3332 transitions. [2021-07-09 17:42:14,955 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 3332 transitions. Word has length 23 [2021-07-09 17:42:14,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:14,955 INFO L482 AbstractCegarLoop]: Abstraction has 1009 states and 3332 transitions. [2021-07-09 17:42:14,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:14,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 3332 transitions. [2021-07-09 17:42:14,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:14,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:14,956 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:15,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4799,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:15,173 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:15,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:15,173 INFO L82 PathProgramCache]: Analyzing trace with hash -345814108, now seen corresponding path program 241 times [2021-07-09 17:42:15,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:15,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67501894] [2021-07-09 17:42:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:15,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:15,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67501894] [2021-07-09 17:42:15,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67501894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:15,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334171923] [2021-07-09 17:42:15,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:15,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:42:15,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:15,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334171923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:15,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:15,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-07-09 17:42:15,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170434234] [2021-07-09 17:42:15,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:42:15,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:15,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:42:15,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:42:15,698 INFO L87 Difference]: Start difference. First operand 1009 states and 3332 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:17,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:17,861 INFO L93 Difference]: Finished difference Result 1485 states and 4760 transitions. [2021-07-09 17:42:17,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:42:17,861 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:17,864 INFO L225 Difference]: With dead ends: 1485 [2021-07-09 17:42:17,864 INFO L226 Difference]: Without dead ends: 1428 [2021-07-09 17:42:17,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1867.7ms TimeCoverageRelationStatistics Valid=335, Invalid=2317, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 17:42:17,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-07-09 17:42:17,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1033. [2021-07-09 17:42:17,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.302325581395349) internal successors, (3408), 1032 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3408 transitions. [2021-07-09 17:42:17,877 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3408 transitions. Word has length 23 [2021-07-09 17:42:17,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:17,877 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3408 transitions. [2021-07-09 17:42:17,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:17,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3408 transitions. [2021-07-09 17:42:17,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:17,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:17,878 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:18,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4895,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:18,093 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:18,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:18,093 INFO L82 PathProgramCache]: Analyzing trace with hash 602455156, now seen corresponding path program 242 times [2021-07-09 17:42:18,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:18,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956682606] [2021-07-09 17:42:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:18,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:18,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956682606] [2021-07-09 17:42:18,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956682606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:18,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399351232] [2021-07-09 17:42:18,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:18,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:18,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:18,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:42:18,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:18,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399351232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:18,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:18,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-07-09 17:42:18,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666577802] [2021-07-09 17:42:18,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:42:18,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:18,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:42:18,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:42:18,645 INFO L87 Difference]: Start difference. First operand 1033 states and 3408 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:22,840 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-07-09 17:42:23,394 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2021-07-09 17:42:23,853 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-07-09 17:42:24,586 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2021-07-09 17:42:24,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:24,723 INFO L93 Difference]: Finished difference Result 2426 states and 7114 transitions. [2021-07-09 17:42:24,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-07-09 17:42:24,724 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:24,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:24,727 INFO L225 Difference]: With dead ends: 2426 [2021-07-09 17:42:24,727 INFO L226 Difference]: Without dead ends: 2105 [2021-07-09 17:42:24,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4099 ImplicationChecksByTransitivity, 4899.1ms TimeCoverageRelationStatistics Valid=895, Invalid=11095, Unknown=0, NotChecked=0, Total=11990 [2021-07-09 17:42:24,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2021-07-09 17:42:24,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1097. [2021-07-09 17:42:24,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1096 states have (on average 3.31478102189781) internal successors, (3633), 1096 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 3633 transitions. [2021-07-09 17:42:24,746 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 3633 transitions. Word has length 23 [2021-07-09 17:42:24,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:24,746 INFO L482 AbstractCegarLoop]: Abstraction has 1097 states and 3633 transitions. [2021-07-09 17:42:24,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:24,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 3633 transitions. [2021-07-09 17:42:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:24,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:24,748 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:24,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4909 [2021-07-09 17:42:24,961 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:24,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:24,961 INFO L82 PathProgramCache]: Analyzing trace with hash 298857606, now seen corresponding path program 243 times [2021-07-09 17:42:24,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:24,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104585859] [2021-07-09 17:42:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:25,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:25,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104585859] [2021-07-09 17:42:25,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104585859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:25,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593209064] [2021-07-09 17:42:25,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:25,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:42:25,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:25,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:42:25,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:25,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:42:25,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:25,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:25,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:25,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:25,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:25,324 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-07-09 17:42:25,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:25,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:25,356 INFO L628 ElimStorePlain]: treesize reduction 20, result has 65.5 percent of original size [2021-07-09 17:42:25,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:42:25,358 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:127, output treesize:30 [2021-07-09 17:42:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:25,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593209064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:25,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:25,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-09 17:42:25,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790548526] [2021-07-09 17:42:25,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:42:25,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:25,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:42:25,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:25,583 INFO L87 Difference]: Start difference. First operand 1097 states and 3633 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:27,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:27,212 INFO L93 Difference]: Finished difference Result 1772 states and 5608 transitions. [2021-07-09 17:42:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 17:42:27,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:27,215 INFO L225 Difference]: With dead ends: 1772 [2021-07-09 17:42:27,215 INFO L226 Difference]: Without dead ends: 1670 [2021-07-09 17:42:27,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1219.9ms TimeCoverageRelationStatistics Valid=239, Invalid=2113, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:42:27,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-07-09 17:42:27,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1102. [2021-07-09 17:42:27,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.31244323342416) internal successors, (3647), 1101 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:27,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3647 transitions. [2021-07-09 17:42:27,230 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3647 transitions. Word has length 23 [2021-07-09 17:42:27,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:27,230 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3647 transitions. [2021-07-09 17:42:27,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:27,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3647 transitions. [2021-07-09 17:42:27,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:27,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:27,232 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:27,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4923 [2021-07-09 17:42:27,448 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:27,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:27,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1212178272, now seen corresponding path program 244 times [2021-07-09 17:42:27,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:27,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425248239] [2021-07-09 17:42:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:27,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:27,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425248239] [2021-07-09 17:42:27,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425248239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:27,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080287798] [2021-07-09 17:42:27,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:27,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:27,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:27,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:42:27,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:28,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080287798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:28,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:28,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-07-09 17:42:28,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983769735] [2021-07-09 17:42:28,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:42:28,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:28,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:42:28,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:28,075 INFO L87 Difference]: Start difference. First operand 1102 states and 3647 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:28,463 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-07-09 17:42:30,283 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-07-09 17:42:31,199 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-07-09 17:42:31,868 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-07-09 17:42:32,600 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-07-09 17:42:32,878 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-07-09 17:42:33,149 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-07-09 17:42:33,590 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-09 17:42:34,231 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-07-09 17:42:34,558 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-07-09 17:42:34,875 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-07-09 17:42:35,214 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-07-09 17:42:35,793 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-07-09 17:42:36,047 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-07-09 17:42:36,624 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-07-09 17:42:37,291 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-07-09 17:42:37,450 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-07-09 17:42:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:37,453 INFO L93 Difference]: Finished difference Result 2858 states and 8256 transitions. [2021-07-09 17:42:37,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-07-09 17:42:37,454 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:37,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:37,457 INFO L225 Difference]: With dead ends: 2858 [2021-07-09 17:42:37,457 INFO L226 Difference]: Without dead ends: 2444 [2021-07-09 17:42:37,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5911 ImplicationChecksByTransitivity, 8043.3ms TimeCoverageRelationStatistics Valid=1328, Invalid=15184, Unknown=0, NotChecked=0, Total=16512 [2021-07-09 17:42:37,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-07-09 17:42:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1160. [2021-07-09 17:42:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 3.3339085418464194) internal successors, (3864), 1159 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:37,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 3864 transitions. [2021-07-09 17:42:37,478 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 3864 transitions. Word has length 23 [2021-07-09 17:42:37,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:37,478 INFO L482 AbstractCegarLoop]: Abstraction has 1160 states and 3864 transitions. [2021-07-09 17:42:37,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 3864 transitions. [2021-07-09 17:42:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:37,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:37,479 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:37,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4964,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:37,693 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:37,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:37,693 INFO L82 PathProgramCache]: Analyzing trace with hash -235280272, now seen corresponding path program 245 times [2021-07-09 17:42:37,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:37,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079779139] [2021-07-09 17:42:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:37,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:37,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079779139] [2021-07-09 17:42:37,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079779139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:37,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728652124] [2021-07-09 17:42:37,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:37,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:42:37,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:37,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:42:37,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:38,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:38,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:38,160 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-07-09 17:42:38,161 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-07-09 17:42:38,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:38,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:38,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:38,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:38,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:38,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:38,228 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:38,294 INFO L628 ElimStorePlain]: treesize reduction 49, result has 57.0 percent of original size [2021-07-09 17:42:38,295 INFO L518 ElimStorePlain]: Eliminatee v_prenex_174 vanished before elimination [2021-07-09 17:42:38,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:42:38,297 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:132, output treesize:57 [2021-07-09 17:42:38,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:38,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:38,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:42:38,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:38,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:38,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:38,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:42:38,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:38,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:38,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:38,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:42:38,810 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:38,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:38,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:38,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:42:38,815 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:38,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:38,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:42:38,819 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:38,962 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-07-09 17:42:38,963 INFO L628 ElimStorePlain]: treesize reduction 153, result has 44.8 percent of original size [2021-07-09 17:42:38,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:38,967 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:38,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:38,970 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:39,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:39,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:42:39,033 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:363, output treesize:80 [2021-07-09 17:42:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:39,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728652124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:39,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:39,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-09 17:42:39,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623372715] [2021-07-09 17:42:39,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:42:39,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:39,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:42:39,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:42:39,193 INFO L87 Difference]: Start difference. First operand 1160 states and 3864 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:40,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:40,271 INFO L93 Difference]: Finished difference Result 1864 states and 5964 transitions. [2021-07-09 17:42:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:42:40,271 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:40,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:40,274 INFO L225 Difference]: With dead ends: 1864 [2021-07-09 17:42:40,274 INFO L226 Difference]: Without dead ends: 1756 [2021-07-09 17:42:40,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1084.7ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:42:40,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-07-09 17:42:40,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1159. [2021-07-09 17:42:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 3.3367875647668392) internal successors, (3864), 1158 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 3864 transitions. [2021-07-09 17:42:40,289 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 3864 transitions. Word has length 23 [2021-07-09 17:42:40,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:40,289 INFO L482 AbstractCegarLoop]: Abstraction has 1159 states and 3864 transitions. [2021-07-09 17:42:40,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:40,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 3864 transitions. [2021-07-09 17:42:40,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:40,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:40,291 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:40,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4985,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:40,507 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:40,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:40,507 INFO L82 PathProgramCache]: Analyzing trace with hash -602834382, now seen corresponding path program 246 times [2021-07-09 17:42:40,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:40,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141265438] [2021-07-09 17:42:40,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:40,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:40,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141265438] [2021-07-09 17:42:40,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141265438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:40,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171584581] [2021-07-09 17:42:40,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:40,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:42:40,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:40,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:42:40,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:42:41,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171584581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:41,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:41,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-07-09 17:42:41,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856793183] [2021-07-09 17:42:41,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:42:41,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:41,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:42:41,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:41,178 INFO L87 Difference]: Start difference. First operand 1159 states and 3864 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:43,765 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-09 17:42:44,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:44,930 INFO L93 Difference]: Finished difference Result 2013 states and 6213 transitions. [2021-07-09 17:42:44,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 17:42:44,930 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:44,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:44,933 INFO L225 Difference]: With dead ends: 2013 [2021-07-09 17:42:44,934 INFO L226 Difference]: Without dead ends: 1908 [2021-07-09 17:42:44,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 3332.8ms TimeCoverageRelationStatistics Valid=633, Invalid=4917, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 17:42:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-07-09 17:42:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1171. [2021-07-09 17:42:44,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.341025641025641) internal successors, (3909), 1170 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3909 transitions. [2021-07-09 17:42:44,950 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3909 transitions. Word has length 23 [2021-07-09 17:42:44,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:44,950 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 3909 transitions. [2021-07-09 17:42:44,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:44,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3909 transitions. [2021-07-09 17:42:44,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:44,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:44,952 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:45,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5126,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:45,165 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:45,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:45,165 INFO L82 PathProgramCache]: Analyzing trace with hash -893034992, now seen corresponding path program 247 times [2021-07-09 17:42:45,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:45,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009194272] [2021-07-09 17:42:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:45,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:45,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009194272] [2021-07-09 17:42:45,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009194272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:45,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449377089] [2021-07-09 17:42:45,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:45,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:42:45,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:45,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:45,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:45,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:45,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:45,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:42:45,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:45,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:45,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:45,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:45,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:42:45,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:42:45,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:45,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:45,829 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:45,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:45,833 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:45,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:45,836 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:45,996 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-07-09 17:42:45,997 INFO L628 ElimStorePlain]: treesize reduction 63, result has 70.3 percent of original size [2021-07-09 17:42:46,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:42:46,003 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:271, output treesize:123 [2021-07-09 17:42:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:46,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449377089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:46,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:46,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-09 17:42:46,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077068858] [2021-07-09 17:42:46,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:42:46,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:46,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:42:46,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:42:46,666 INFO L87 Difference]: Start difference. First operand 1171 states and 3909 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:48,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:48,491 INFO L93 Difference]: Finished difference Result 1732 states and 5482 transitions. [2021-07-09 17:42:48,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:42:48,492 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:48,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:48,495 INFO L225 Difference]: With dead ends: 1732 [2021-07-09 17:42:48,495 INFO L226 Difference]: Without dead ends: 1627 [2021-07-09 17:42:48,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1619.2ms TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:42:48,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-07-09 17:42:48,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1188. [2021-07-09 17:42:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 3.3445661331086773) internal successors, (3970), 1187 states have internal predecessors, (3970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 3970 transitions. [2021-07-09 17:42:48,512 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 3970 transitions. Word has length 23 [2021-07-09 17:42:48,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:48,512 INFO L482 AbstractCegarLoop]: Abstraction has 1188 states and 3970 transitions. [2021-07-09 17:42:48,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:48,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 3970 transitions. [2021-07-09 17:42:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:48,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:48,514 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:48,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5142 [2021-07-09 17:42:48,722 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:48,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:48,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1872595910, now seen corresponding path program 248 times [2021-07-09 17:42:48,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:48,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156888730] [2021-07-09 17:42:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:42:48,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:48,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156888730] [2021-07-09 17:42:48,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156888730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:48,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811323692] [2021-07-09 17:42:48,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:48,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:42:48,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:48,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:42:48,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:42:49,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811323692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:49,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:49,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:42:49,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710812492] [2021-07-09 17:42:49,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:42:49,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:49,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:42:49,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:42:49,224 INFO L87 Difference]: Start difference. First operand 1188 states and 3970 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:54,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:54,387 INFO L93 Difference]: Finished difference Result 2749 states and 8424 transitions. [2021-07-09 17:42:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-09 17:42:54,388 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:54,392 INFO L225 Difference]: With dead ends: 2749 [2021-07-09 17:42:54,392 INFO L226 Difference]: Without dead ends: 2512 [2021-07-09 17:42:54,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 4425.2ms TimeCoverageRelationStatistics Valid=715, Invalid=6091, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 17:42:54,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-07-09 17:42:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 1296. [2021-07-09 17:42:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.4308880308880307) internal successors, (4443), 1295 states have internal predecessors, (4443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 4443 transitions. [2021-07-09 17:42:54,412 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 4443 transitions. Word has length 23 [2021-07-09 17:42:54,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:54,412 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 4443 transitions. [2021-07-09 17:42:54,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:54,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 4443 transitions. [2021-07-09 17:42:54,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:54,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:54,414 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:54,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5275 [2021-07-09 17:42:54,630 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:54,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:54,630 INFO L82 PathProgramCache]: Analyzing trace with hash -88296408, now seen corresponding path program 249 times [2021-07-09 17:42:54,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:54,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887227407] [2021-07-09 17:42:54,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:42:54,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:54,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887227407] [2021-07-09 17:42:54,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887227407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:54,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94361726] [2021-07-09 17:42:54,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:54,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:42:54,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:54,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 17:42:54,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:55,277 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-07-09 17:42:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:55,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94361726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:55,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:55,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-07-09 17:42:55,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992356514] [2021-07-09 17:42:55,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:42:55,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:55,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:42:55,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:42:55,572 INFO L87 Difference]: Start difference. First operand 1296 states and 4443 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:58,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:58,235 INFO L93 Difference]: Finished difference Result 2273 states and 7227 transitions. [2021-07-09 17:42:58,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:42:58,235 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:58,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:58,238 INFO L225 Difference]: With dead ends: 2273 [2021-07-09 17:42:58,238 INFO L226 Difference]: Without dead ends: 2091 [2021-07-09 17:42:58,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2714.7ms TimeCoverageRelationStatistics Valid=409, Invalid=3131, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:42:58,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-07-09 17:42:58,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1342. [2021-07-09 17:42:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 3.41834451901566) internal successors, (4584), 1341 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 4584 transitions. [2021-07-09 17:42:58,257 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 4584 transitions. Word has length 23 [2021-07-09 17:42:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:58,257 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 4584 transitions. [2021-07-09 17:42:58,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 4584 transitions. [2021-07-09 17:42:58,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:58,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:58,259 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:42:58,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5295 [2021-07-09 17:42:58,471 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:42:58,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:42:58,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2075591694, now seen corresponding path program 250 times [2021-07-09 17:42:58,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:42:58,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119365029] [2021-07-09 17:42:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:42:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:42:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:58,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:42:58,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119365029] [2021-07-09 17:42:58,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119365029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:58,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721124722] [2021-07-09 17:42:58,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:42:58,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:42:58,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:42:58,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:42:58,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:42:58,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:42:58,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:58,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:58,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:58,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:58,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:58,780 INFO L628 ElimStorePlain]: treesize reduction 32, result has 67.7 percent of original size [2021-07-09 17:42:58,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:58,783 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:58,817 INFO L628 ElimStorePlain]: treesize reduction 22, result has 65.6 percent of original size [2021-07-09 17:42:58,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:42:58,819 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:35 [2021-07-09 17:42:59,066 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_187, ends_with_10, v_prenex_186, v_prenex_185], 1=[ends_with_2]} [2021-07-09 17:42:59,069 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:42:59,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:59,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:59,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:59,197 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-07-09 17:42:59,198 INFO L628 ElimStorePlain]: treesize reduction 66, result has 65.8 percent of original size [2021-07-09 17:42:59,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:59,202 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:59,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:59,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:59,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:42:59,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:59,265 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:59,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:59,268 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:59,372 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-07-09 17:42:59,372 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-07-09 17:42:59,372 INFO L518 ElimStorePlain]: Eliminatee v_prenex_185 vanished before elimination [2021-07-09 17:42:59,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:42:59,376 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:59,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:59,379 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:59,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:59,382 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:59,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:42:59,385 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:42:59,460 INFO L628 ElimStorePlain]: treesize reduction 22, result has 77.3 percent of original size [2021-07-09 17:42:59,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:42:59,461 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:229, output treesize:45 [2021-07-09 17:42:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:42:59,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721124722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:42:59,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:42:59,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:42:59,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419289728] [2021-07-09 17:42:59,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:42:59,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:42:59,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:42:59,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:42:59,557 INFO L87 Difference]: Start difference. First operand 1342 states and 4584 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:59,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:42:59,899 INFO L93 Difference]: Finished difference Result 1665 states and 5536 transitions. [2021-07-09 17:42:59,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:42:59,899 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:42:59,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:42:59,902 INFO L225 Difference]: With dead ends: 1665 [2021-07-09 17:42:59,902 INFO L226 Difference]: Without dead ends: 1620 [2021-07-09 17:42:59,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:42:59,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-07-09 17:42:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1277. [2021-07-09 17:42:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 3.4130094043887147) internal successors, (4355), 1276 states have internal predecessors, (4355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:59,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 4355 transitions. [2021-07-09 17:42:59,917 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 4355 transitions. Word has length 23 [2021-07-09 17:42:59,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:42:59,917 INFO L482 AbstractCegarLoop]: Abstraction has 1277 states and 4355 transitions. [2021-07-09 17:42:59,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:42:59,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 4355 transitions. [2021-07-09 17:42:59,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:42:59,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:42:59,919 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:00,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5320 [2021-07-09 17:43:00,128 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:00,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:00,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1184269814, now seen corresponding path program 251 times [2021-07-09 17:43:00,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:00,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299929302] [2021-07-09 17:43:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:00,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:00,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299929302] [2021-07-09 17:43:00,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299929302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:00,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641264275] [2021-07-09 17:43:00,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:00,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:43:00,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:00,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:43:00,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:00,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:00,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:00,564 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-07-09 17:43:00,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:00,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:00,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:00,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:00,634 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.2 percent of original size [2021-07-09 17:43:00,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:43:00,636 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:107, output treesize:57 [2021-07-09 17:43:00,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:00,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:00,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:43:00,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:00,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:00,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:00,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:43:00,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:00,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:00,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:00,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:43:00,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:00,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:00,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:00,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:43:00,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:00,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:00,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:43:00,956 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:01,014 INFO L628 ElimStorePlain]: treesize reduction 45, result has 55.9 percent of original size [2021-07-09 17:43:01,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:43:01,015 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:178, output treesize:41 [2021-07-09 17:43:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:01,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641264275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:01,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:01,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 17:43:01,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475986520] [2021-07-09 17:43:01,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:01,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:01,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:01,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:01,099 INFO L87 Difference]: Start difference. First operand 1277 states and 4355 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:01,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:01,523 INFO L93 Difference]: Finished difference Result 1650 states and 5508 transitions. [2021-07-09 17:43:01,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:43:01,523 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:43:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:01,525 INFO L225 Difference]: With dead ends: 1650 [2021-07-09 17:43:01,526 INFO L226 Difference]: Without dead ends: 1596 [2021-07-09 17:43:01,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 444.3ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:43:01,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-07-09 17:43:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1256. [2021-07-09 17:43:01,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 3.4087649402390436) internal successors, (4278), 1255 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 4278 transitions. [2021-07-09 17:43:01,541 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 4278 transitions. Word has length 23 [2021-07-09 17:43:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:01,541 INFO L482 AbstractCegarLoop]: Abstraction has 1256 states and 4278 transitions. [2021-07-09 17:43:01,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 4278 transitions. [2021-07-09 17:43:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:43:01,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:01,542 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:01,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5367,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:01,758 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:01,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:01,758 INFO L82 PathProgramCache]: Analyzing trace with hash 2108940534, now seen corresponding path program 252 times [2021-07-09 17:43:01,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:01,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098826000] [2021-07-09 17:43:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:01,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:01,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098826000] [2021-07-09 17:43:01,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098826000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:01,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844069776] [2021-07-09 17:43:01,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:02,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:43:02,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:02,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:43:02,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:02,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844069776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:02,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:02,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-07-09 17:43:02,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469577779] [2021-07-09 17:43:02,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:43:02,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:02,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:43:02,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:43:02,281 INFO L87 Difference]: Start difference. First operand 1256 states and 4278 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:03,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:03,392 INFO L93 Difference]: Finished difference Result 1604 states and 5367 transitions. [2021-07-09 17:43:03,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:43:03,392 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:43:03,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:03,395 INFO L225 Difference]: With dead ends: 1604 [2021-07-09 17:43:03,395 INFO L226 Difference]: Without dead ends: 1538 [2021-07-09 17:43:03,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 937.7ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:43:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-07-09 17:43:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1259. [2021-07-09 17:43:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 3.4054054054054053) internal successors, (4284), 1258 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 4284 transitions. [2021-07-09 17:43:03,410 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 4284 transitions. Word has length 23 [2021-07-09 17:43:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:03,410 INFO L482 AbstractCegarLoop]: Abstraction has 1259 states and 4284 transitions. [2021-07-09 17:43:03,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 4284 transitions. [2021-07-09 17:43:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:43:03,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:03,412 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:03,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5453,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:03,625 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:03,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:03,625 INFO L82 PathProgramCache]: Analyzing trace with hash -930834746, now seen corresponding path program 253 times [2021-07-09 17:43:03,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:03,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068587932] [2021-07-09 17:43:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:03,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:03,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068587932] [2021-07-09 17:43:03,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068587932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:03,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706199053] [2021-07-09 17:43:03,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:03,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:43:03,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:04,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706199053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:04,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:04,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-07-09 17:43:04,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463209800] [2021-07-09 17:43:04,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:43:04,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:04,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:43:04,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:43:04,257 INFO L87 Difference]: Start difference. First operand 1259 states and 4284 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:04,719 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-07-09 17:43:06,676 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-07-09 17:43:07,489 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-07-09 17:43:08,201 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-07-09 17:43:08,324 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-07-09 17:43:08,527 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-07-09 17:43:08,838 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-07-09 17:43:09,243 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-07-09 17:43:09,529 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-07-09 17:43:09,743 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-07-09 17:43:09,978 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-07-09 17:43:10,159 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-07-09 17:43:10,399 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-07-09 17:43:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:10,569 INFO L93 Difference]: Finished difference Result 2846 states and 8745 transitions. [2021-07-09 17:43:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-09 17:43:10,569 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:43:10,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:10,573 INFO L225 Difference]: With dead ends: 2846 [2021-07-09 17:43:10,573 INFO L226 Difference]: Without dead ends: 2537 [2021-07-09 17:43:10,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2567 ImplicationChecksByTransitivity, 5746.7ms TimeCoverageRelationStatistics Valid=913, Invalid=7097, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 17:43:10,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-07-09 17:43:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1324. [2021-07-09 17:43:10,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.4640967498110355) internal successors, (4583), 1323 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 4583 transitions. [2021-07-09 17:43:10,595 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 4583 transitions. Word has length 23 [2021-07-09 17:43:10,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:10,595 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 4583 transitions. [2021-07-09 17:43:10,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:10,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 4583 transitions. [2021-07-09 17:43:10,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:43:10,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:10,596 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:10,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5464 [2021-07-09 17:43:10,812 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:10,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:10,812 INFO L82 PathProgramCache]: Analyzing trace with hash 359706776, now seen corresponding path program 254 times [2021-07-09 17:43:10,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:10,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787185781] [2021-07-09 17:43:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:11,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:11,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787185781] [2021-07-09 17:43:11,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787185781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:11,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083361022] [2021-07-09 17:43:11,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:11,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:11,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:11,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:43:11,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:11,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083361022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:11,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:11,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 17:43:11,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844505699] [2021-07-09 17:43:11,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:11,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:11,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:11,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:11,346 INFO L87 Difference]: Start difference. First operand 1324 states and 4583 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:15,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:15,113 INFO L93 Difference]: Finished difference Result 2176 states and 7003 transitions. [2021-07-09 17:43:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 17:43:15,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:43:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:15,117 INFO L225 Difference]: With dead ends: 2176 [2021-07-09 17:43:15,117 INFO L226 Difference]: Without dead ends: 2029 [2021-07-09 17:43:15,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 3206.3ms TimeCoverageRelationStatistics Valid=597, Invalid=5723, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 17:43:15,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-07-09 17:43:15,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1362. [2021-07-09 17:43:15,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 3.476855253490081) internal successors, (4732), 1361 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:15,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 4732 transitions. [2021-07-09 17:43:15,135 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 4732 transitions. Word has length 23 [2021-07-09 17:43:15,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:15,135 INFO L482 AbstractCegarLoop]: Abstraction has 1362 states and 4732 transitions. [2021-07-09 17:43:15,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 4732 transitions. [2021-07-09 17:43:15,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:43:15,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:15,137 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:15,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5476,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:15,353 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:15,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1320997318, now seen corresponding path program 255 times [2021-07-09 17:43:15,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:15,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625566897] [2021-07-09 17:43:15,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:15,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:15,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625566897] [2021-07-09 17:43:15,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625566897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:15,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496610555] [2021-07-09 17:43:15,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:15,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:43:15,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:15,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:43:15,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:15,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:15,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:15,714 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-07-09 17:43:15,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:15,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:15,768 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2021-07-09 17:43:15,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:15,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:15,818 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.6 percent of original size [2021-07-09 17:43:15,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:43:15,820 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:107, output treesize:57 [2021-07-09 17:43:16,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:16,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:16,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:43:16,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:16,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:16,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:16,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:43:16,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:16,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:16,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:16,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:43:16,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:16,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:16,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:43:16,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:16,102 INFO L628 ElimStorePlain]: treesize reduction 26, result has 68.7 percent of original size [2021-07-09 17:43:16,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:43:16,103 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:151, output treesize:41 [2021-07-09 17:43:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:16,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496610555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:16,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:16,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:43:16,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300176986] [2021-07-09 17:43:16,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:43:16,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:16,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:43:16,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:43:16,180 INFO L87 Difference]: Start difference. First operand 1362 states and 4732 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:16,610 INFO L93 Difference]: Finished difference Result 1860 states and 6275 transitions. [2021-07-09 17:43:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:43:16,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:43:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:16,613 INFO L225 Difference]: With dead ends: 1860 [2021-07-09 17:43:16,613 INFO L226 Difference]: Without dead ends: 1806 [2021-07-09 17:43:16,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 524.2ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:43:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-07-09 17:43:16,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1380. [2021-07-09 17:43:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.4851341551849164) internal successors, (4806), 1379 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4806 transitions. [2021-07-09 17:43:16,631 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4806 transitions. Word has length 23 [2021-07-09 17:43:16,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:16,631 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4806 transitions. [2021-07-09 17:43:16,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4806 transitions. [2021-07-09 17:43:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:43:16,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:16,633 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:16,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5492 [2021-07-09 17:43:16,849 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:16,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:16,849 INFO L82 PathProgramCache]: Analyzing trace with hash 148239946, now seen corresponding path program 256 times [2021-07-09 17:43:16,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:16,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333152282] [2021-07-09 17:43:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:17,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:17,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333152282] [2021-07-09 17:43:17,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333152282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:17,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992561549] [2021-07-09 17:43:17,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:17,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:17,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:17,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:17,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:17,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:17,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:17,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:17,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:17,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:17,241 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:17,288 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-07-09 17:43:17,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:17,291 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:17,325 INFO L628 ElimStorePlain]: treesize reduction 20, result has 65.5 percent of original size [2021-07-09 17:43:17,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:43:17,326 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:127, output treesize:33 [2021-07-09 17:43:17,669 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_10, v_prenex_194], 1=[ends_with_2]} [2021-07-09 17:43:17,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:17,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:17,676 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:17,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:17,838 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-07-09 17:43:17,839 INFO L628 ElimStorePlain]: treesize reduction 49, result has 78.1 percent of original size [2021-07-09 17:43:17,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:17,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:17,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:17,847 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:17,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:17,851 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:17,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:17,854 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:17,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:17,858 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:17,988 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-07-09 17:43:17,988 INFO L628 ElimStorePlain]: treesize reduction 26, result has 83.4 percent of original size [2021-07-09 17:43:17,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:17,993 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:17,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:17,997 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:17,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:18,000 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:18,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:18,004 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:18,092 INFO L628 ElimStorePlain]: treesize reduction 25, result has 78.4 percent of original size [2021-07-09 17:43:18,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:43:18,094 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:261, output treesize:57 [2021-07-09 17:43:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:18,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992561549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:18,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:18,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-07-09 17:43:18,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247015381] [2021-07-09 17:43:18,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:18,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:18,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:18,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:18,213 INFO L87 Difference]: Start difference. First operand 1380 states and 4806 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:19,907 INFO L93 Difference]: Finished difference Result 1752 states and 5922 transitions. [2021-07-09 17:43:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:43:19,907 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:43:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:19,910 INFO L225 Difference]: With dead ends: 1752 [2021-07-09 17:43:19,910 INFO L226 Difference]: Without dead ends: 1650 [2021-07-09 17:43:19,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1590.2ms TimeCoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:43:19,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-07-09 17:43:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1350. [2021-07-09 17:43:19,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 3.467753891771683) internal successors, (4678), 1349 states have internal predecessors, (4678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:19,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 4678 transitions. [2021-07-09 17:43:19,926 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 4678 transitions. Word has length 23 [2021-07-09 17:43:19,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:19,926 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 4678 transitions. [2021-07-09 17:43:19,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:19,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 4678 transitions. [2021-07-09 17:43:19,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:43:19,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:19,928 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:20,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5537,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:20,145 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:20,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1096509210, now seen corresponding path program 257 times [2021-07-09 17:43:20,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:20,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455060577] [2021-07-09 17:43:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:20,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:20,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455060577] [2021-07-09 17:43:20,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455060577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:20,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556806691] [2021-07-09 17:43:20,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:20,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:20,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:20,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:20,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:20,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:20,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:20,627 INFO L628 ElimStorePlain]: treesize reduction 48, result has 64.7 percent of original size [2021-07-09 17:43:20,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:20,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:20,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:20,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:20,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:20,727 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-07-09 17:43:20,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:20,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:20,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:20,757 INFO L518 ElimStorePlain]: Eliminatee v_prenex_196 vanished before elimination [2021-07-09 17:43:20,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:43:20,757 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:139, output treesize:58 [2021-07-09 17:43:20,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:20,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:20,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:20,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:21,042 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-07-09 17:43:21,042 INFO L628 ElimStorePlain]: treesize reduction 169, result has 46.3 percent of original size [2021-07-09 17:43:21,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:21,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:21,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:21,049 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:21,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:21,053 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:21,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:21,056 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:21,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:21,060 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:21,159 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-07-09 17:43:21,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:21,163 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:21,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:21,166 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:21,225 INFO L628 ElimStorePlain]: treesize reduction 51, result has 56.8 percent of original size [2021-07-09 17:43:21,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:43:21,227 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:321, output treesize:55 [2021-07-09 17:43:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:21,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556806691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:21,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:21,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-07-09 17:43:21,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483355752] [2021-07-09 17:43:21,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:21,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:21,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:21,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:21,365 INFO L87 Difference]: Start difference. First operand 1350 states and 4678 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:22,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:22,513 INFO L93 Difference]: Finished difference Result 1969 states and 6573 transitions. [2021-07-09 17:43:22,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:43:22,514 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:43:22,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:22,517 INFO L225 Difference]: With dead ends: 1969 [2021-07-09 17:43:22,517 INFO L226 Difference]: Without dead ends: 1918 [2021-07-09 17:43:22,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1124.7ms TimeCoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:43:22,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-07-09 17:43:22,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1339. [2021-07-09 17:43:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.4715994020926755) internal successors, (4645), 1338 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4645 transitions. [2021-07-09 17:43:22,535 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4645 transitions. Word has length 23 [2021-07-09 17:43:22,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:22,536 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 4645 transitions. [2021-07-09 17:43:22,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:22,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4645 transitions. [2021-07-09 17:43:22,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:43:22,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:22,537 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:22,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5640 [2021-07-09 17:43:22,753 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:22,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:22,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1328644520, now seen corresponding path program 258 times [2021-07-09 17:43:22,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:22,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288841411] [2021-07-09 17:43:22,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:22,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:22,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288841411] [2021-07-09 17:43:22,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288841411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:22,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848802475] [2021-07-09 17:43:22,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:22,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:43:22,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:22,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:43:22,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:23,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:43:23,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:23,159 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.3 percent of original size [2021-07-09 17:43:23,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:43:23,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:23,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:43:23,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:23,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:43:23,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:23,221 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-07-09 17:43:23,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:43:23,222 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:111, output treesize:62 [2021-07-09 17:43:23,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:23,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:23,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:23,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:23,492 INFO L628 ElimStorePlain]: treesize reduction 92, result has 47.1 percent of original size [2021-07-09 17:43:23,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:23,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:23,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:23,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:23,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:23,502 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:23,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:23,533 INFO L518 ElimStorePlain]: Eliminatee v_prenex_202 vanished before elimination [2021-07-09 17:43:23,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:23,536 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:23,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:23,539 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:23,592 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.4 percent of original size [2021-07-09 17:43:23,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:43:23,593 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 5 variables, input treesize:204, output treesize:51 [2021-07-09 17:43:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:23,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848802475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:23,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:23,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-07-09 17:43:23,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118118616] [2021-07-09 17:43:23,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:43:23,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:23,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:43:23,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:43:23,659 INFO L87 Difference]: Start difference. First operand 1339 states and 4645 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:24,661 INFO L93 Difference]: Finished difference Result 1855 states and 6186 transitions. [2021-07-09 17:43:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:43:24,661 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:43:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:24,664 INFO L225 Difference]: With dead ends: 1855 [2021-07-09 17:43:24,664 INFO L226 Difference]: Without dead ends: 1804 [2021-07-09 17:43:24,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 939.8ms TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:43:24,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2021-07-09 17:43:24,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1356. [2021-07-09 17:43:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.482656826568266) internal successors, (4719), 1355 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:24,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4719 transitions. [2021-07-09 17:43:24,682 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4719 transitions. Word has length 23 [2021-07-09 17:43:24,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:24,682 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4719 transitions. [2021-07-09 17:43:24,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4719 transitions. [2021-07-09 17:43:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:43:24,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:24,684 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:24,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5683,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:24,897 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:24,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:24,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1065013066, now seen corresponding path program 259 times [2021-07-09 17:43:24,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:24,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640389897] [2021-07-09 17:43:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:25,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:25,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640389897] [2021-07-09 17:43:25,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640389897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:25,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900956799] [2021-07-09 17:43:25,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:25,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:43:25,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:25,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900956799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:25,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:25,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 17:43:25,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658770623] [2021-07-09 17:43:25,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:25,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:25,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:25,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:25,375 INFO L87 Difference]: Start difference. First operand 1356 states and 4719 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:29,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:29,091 INFO L93 Difference]: Finished difference Result 2432 states and 7719 transitions. [2021-07-09 17:43:29,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 17:43:29,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:43:29,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:29,095 INFO L225 Difference]: With dead ends: 2432 [2021-07-09 17:43:29,095 INFO L226 Difference]: Without dead ends: 2270 [2021-07-09 17:43:29,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 3139.1ms TimeCoverageRelationStatistics Valid=606, Invalid=5556, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 17:43:29,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-07-09 17:43:29,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1375. [2021-07-09 17:43:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.4963609898107713) internal successors, (4804), 1374 states have internal predecessors, (4804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4804 transitions. [2021-07-09 17:43:29,115 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4804 transitions. Word has length 23 [2021-07-09 17:43:29,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:29,115 INFO L482 AbstractCegarLoop]: Abstraction has 1375 states and 4804 transitions. [2021-07-09 17:43:29,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:29,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4804 transitions. [2021-07-09 17:43:29,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:43:29,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:29,116 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:29,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5721,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:29,332 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:29,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:29,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1756904426, now seen corresponding path program 260 times [2021-07-09 17:43:29,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:29,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143215194] [2021-07-09 17:43:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:29,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:29,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143215194] [2021-07-09 17:43:29,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143215194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:29,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721587369] [2021-07-09 17:43:29,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:29,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:29,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:29,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:43:29,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:29,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:29,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:29,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:29,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:29,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:29,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:29,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:29,847 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:29,907 INFO L628 ElimStorePlain]: treesize reduction 52, result has 57.4 percent of original size [2021-07-09 17:43:29,907 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-07-09 17:43:29,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-07-09 17:43:29,909 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:70 [2021-07-09 17:43:30,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:30,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:30,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:43:30,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:30,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:30,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:30,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:30,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:30,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:43:30,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:30,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:30,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:43:30,262 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:30,321 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.4 percent of original size [2021-07-09 17:43:30,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:30,325 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:30,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:30,328 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:30,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:30,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:43:30,354 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:207, output treesize:33 [2021-07-09 17:43:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:30,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721587369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:30,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:30,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-09 17:43:30,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992345952] [2021-07-09 17:43:30,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:43:30,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:30,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:43:30,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:43:30,432 INFO L87 Difference]: Start difference. First operand 1375 states and 4804 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:32,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:32,283 INFO L93 Difference]: Finished difference Result 1790 states and 5946 transitions. [2021-07-09 17:43:32,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:43:32,284 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:43:32,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:32,287 INFO L225 Difference]: With dead ends: 1790 [2021-07-09 17:43:32,287 INFO L226 Difference]: Without dead ends: 1730 [2021-07-09 17:43:32,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1442.7ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:43:32,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-07-09 17:43:32,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1351. [2021-07-09 17:43:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 3.4955555555555557) internal successors, (4719), 1350 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 4719 transitions. [2021-07-09 17:43:32,305 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 4719 transitions. Word has length 23 [2021-07-09 17:43:32,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:32,305 INFO L482 AbstractCegarLoop]: Abstraction has 1351 states and 4719 transitions. [2021-07-09 17:43:32,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:32,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 4719 transitions. [2021-07-09 17:43:32,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:43:32,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:32,307 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:32,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5736,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:32,523 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:32,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:32,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1028994524, now seen corresponding path program 261 times [2021-07-09 17:43:32,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:32,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828881306] [2021-07-09 17:43:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:32,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:32,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828881306] [2021-07-09 17:43:32,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828881306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:32,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989401572] [2021-07-09 17:43:32,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:32,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:43:32,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:32,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:43:32,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:33,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989401572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:33,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:33,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-07-09 17:43:33,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999801577] [2021-07-09 17:43:33,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:43:33,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:33,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:43:33,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:43:33,149 INFO L87 Difference]: Start difference. First operand 1351 states and 4719 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:35,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:35,050 INFO L93 Difference]: Finished difference Result 1756 states and 5813 transitions. [2021-07-09 17:43:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:43:35,050 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:43:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:35,053 INFO L225 Difference]: With dead ends: 1756 [2021-07-09 17:43:35,053 INFO L226 Difference]: Without dead ends: 1680 [2021-07-09 17:43:35,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1470.1ms TimeCoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:43:35,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-07-09 17:43:35,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1318. [2021-07-09 17:43:35,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.4738041002277904) internal successors, (4575), 1317 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4575 transitions. [2021-07-09 17:43:35,070 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4575 transitions. Word has length 23 [2021-07-09 17:43:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:35,070 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 4575 transitions. [2021-07-09 17:43:35,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4575 transitions. [2021-07-09 17:43:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:43:35,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:35,072 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:35,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5818 [2021-07-09 17:43:35,288 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:35,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:35,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1103912864, now seen corresponding path program 262 times [2021-07-09 17:43:35,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:35,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379473198] [2021-07-09 17:43:35,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:35,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:35,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379473198] [2021-07-09 17:43:35,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379473198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:35,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240640886] [2021-07-09 17:43:35,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:35,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:35,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:35,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:43:35,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:35,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:35,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:35,866 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-07-09 17:43:35,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:35,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:35,938 INFO L628 ElimStorePlain]: treesize reduction 28, result has 71.7 percent of original size [2021-07-09 17:43:35,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:35,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:36,003 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.6 percent of original size [2021-07-09 17:43:36,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:43:36,005 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:107, output treesize:57 [2021-07-09 17:43:36,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:36,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:36,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:43:36,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:36,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:36,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:36,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:43:36,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:36,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:36,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:36,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:43:36,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:36,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:36,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:43:36,357 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:36,491 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-07-09 17:43:36,492 INFO L628 ElimStorePlain]: treesize reduction 99, result has 55.6 percent of original size [2021-07-09 17:43:36,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:36,496 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:36,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:36,499 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:36,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:36,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:43:36,562 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:301, output treesize:80 [2021-07-09 17:43:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:36,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240640886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:36,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:36,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-07-09 17:43:36,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517014535] [2021-07-09 17:43:36,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:36,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:36,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:36,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:36,729 INFO L87 Difference]: Start difference. First operand 1318 states and 4575 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:37,577 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-07-09 17:43:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:37,710 INFO L93 Difference]: Finished difference Result 1728 states and 5785 transitions. [2021-07-09 17:43:37,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:43:37,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:43:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:37,713 INFO L225 Difference]: With dead ends: 1728 [2021-07-09 17:43:37,713 INFO L226 Difference]: Without dead ends: 1674 [2021-07-09 17:43:37,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1232.4ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:43:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-07-09 17:43:37,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1307. [2021-07-09 17:43:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 3.4640122511485454) internal successors, (4524), 1306 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4524 transitions. [2021-07-09 17:43:37,729 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4524 transitions. Word has length 23 [2021-07-09 17:43:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:37,730 INFO L482 AbstractCegarLoop]: Abstraction has 1307 states and 4524 transitions. [2021-07-09 17:43:37,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4524 transitions. [2021-07-09 17:43:37,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:43:37,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:37,731 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:37,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5836 [2021-07-09 17:43:37,947 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:37,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:37,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1968196404, now seen corresponding path program 263 times [2021-07-09 17:43:37,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:37,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724089414] [2021-07-09 17:43:37,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:38,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:38,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724089414] [2021-07-09 17:43:38,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724089414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:38,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201821213] [2021-07-09 17:43:38,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:38,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:43:38,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:38,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:38,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:38,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201821213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:38,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:38,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-07-09 17:43:38,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733698649] [2021-07-09 17:43:38,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:43:38,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:38,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:43:38,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:43:38,495 INFO L87 Difference]: Start difference. First operand 1307 states and 4524 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:40,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:40,074 INFO L93 Difference]: Finished difference Result 1893 states and 6259 transitions. [2021-07-09 17:43:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:43:40,074 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:43:40,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:40,077 INFO L225 Difference]: With dead ends: 1893 [2021-07-09 17:43:40,077 INFO L226 Difference]: Without dead ends: 1784 [2021-07-09 17:43:40,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1117.4ms TimeCoverageRelationStatistics Valid=275, Invalid=2275, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:43:40,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-07-09 17:43:40,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1302. [2021-07-09 17:43:40,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.458877786318217) internal successors, (4500), 1301 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4500 transitions. [2021-07-09 17:43:40,112 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4500 transitions. Word has length 23 [2021-07-09 17:43:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:40,112 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4500 transitions. [2021-07-09 17:43:40,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4500 transitions. [2021-07-09 17:43:40,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:43:40,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:40,113 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:40,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5893 [2021-07-09 17:43:40,330 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:40,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:40,330 INFO L82 PathProgramCache]: Analyzing trace with hash 109506426, now seen corresponding path program 264 times [2021-07-09 17:43:40,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:40,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472201853] [2021-07-09 17:43:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:40,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:40,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472201853] [2021-07-09 17:43:40,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472201853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:40,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109762634] [2021-07-09 17:43:40,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:40,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:43:40,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:40,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:40,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109762634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:40,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:40,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:43:40,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573352523] [2021-07-09 17:43:40,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:43:40,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:40,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:43:40,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:40,699 INFO L87 Difference]: Start difference. First operand 1302 states and 4500 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:44,009 INFO L93 Difference]: Finished difference Result 2376 states and 7653 transitions. [2021-07-09 17:43:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 17:43:44,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:43:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:44,013 INFO L225 Difference]: With dead ends: 2376 [2021-07-09 17:43:44,013 INFO L226 Difference]: Without dead ends: 2187 [2021-07-09 17:43:44,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 2655.7ms TimeCoverageRelationStatistics Valid=536, Invalid=4434, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:43:44,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-07-09 17:43:44,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1345. [2021-07-09 17:43:44,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.486607142857143) internal successors, (4686), 1344 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:44,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4686 transitions. [2021-07-09 17:43:44,061 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4686 transitions. Word has length 23 [2021-07-09 17:43:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:44,061 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 4686 transitions. [2021-07-09 17:43:44,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:44,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4686 transitions. [2021-07-09 17:43:44,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:43:44,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:44,063 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:44,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5911 [2021-07-09 17:43:44,277 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:44,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:44,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2135427910, now seen corresponding path program 265 times [2021-07-09 17:43:44,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:44,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700601434] [2021-07-09 17:43:44,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:44,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:44,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700601434] [2021-07-09 17:43:44,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700601434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:44,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867272908] [2021-07-09 17:43:44,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:44,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:43:44,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:44,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867272908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:44,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:44,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:43:44,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874486758] [2021-07-09 17:43:44,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:43:44,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:44,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:43:44,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:44,694 INFO L87 Difference]: Start difference. First operand 1345 states and 4686 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:47,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:47,174 INFO L93 Difference]: Finished difference Result 2059 states and 6741 transitions. [2021-07-09 17:43:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 17:43:47,174 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:43:47,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:47,178 INFO L225 Difference]: With dead ends: 2059 [2021-07-09 17:43:47,178 INFO L226 Difference]: Without dead ends: 1899 [2021-07-09 17:43:47,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1921.1ms TimeCoverageRelationStatistics Valid=410, Invalid=3130, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:43:47,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-07-09 17:43:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1275. [2021-07-09 17:43:47,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 3.4505494505494507) internal successors, (4396), 1274 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:47,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 4396 transitions. [2021-07-09 17:43:47,196 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 4396 transitions. Word has length 23 [2021-07-09 17:43:47,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:47,196 INFO L482 AbstractCegarLoop]: Abstraction has 1275 states and 4396 transitions. [2021-07-09 17:43:47,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 4396 transitions. [2021-07-09 17:43:47,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:43:47,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:47,198 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:47,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5930,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:47,414 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:47,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:47,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2009463328, now seen corresponding path program 266 times [2021-07-09 17:43:47,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:47,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309864023] [2021-07-09 17:43:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:47,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:47,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309864023] [2021-07-09 17:43:47,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309864023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:47,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133513902] [2021-07-09 17:43:47,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:47,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:43:47,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:47,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:43:47,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:47,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:47,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:48,022 INFO L628 ElimStorePlain]: treesize reduction 34, result has 74.6 percent of original size [2021-07-09 17:43:48,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:48,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:48,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:48,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:48,097 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.1 percent of original size [2021-07-09 17:43:48,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:48,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:48,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:48,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:43:48,166 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:62 [2021-07-09 17:43:48,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:48,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:48,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:43:48,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:48,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:48,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:48,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:43:48,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:48,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:48,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:48,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:43:48,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:48,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:43:48,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:43:48,401 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:48,441 INFO L628 ElimStorePlain]: treesize reduction 45, result has 46.4 percent of original size [2021-07-09 17:43:48,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:43:48,443 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:33 [2021-07-09 17:43:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:48,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133513902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:48,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:48,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-09 17:43:48,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308815897] [2021-07-09 17:43:48,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:43:48,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:48,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:43:48,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:43:48,518 INFO L87 Difference]: Start difference. First operand 1275 states and 4396 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:51,257 INFO L93 Difference]: Finished difference Result 1896 states and 6139 transitions. [2021-07-09 17:43:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:43:51,258 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:43:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:51,261 INFO L225 Difference]: With dead ends: 1896 [2021-07-09 17:43:51,261 INFO L226 Difference]: Without dead ends: 1788 [2021-07-09 17:43:51,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 2250.5ms TimeCoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:43:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2021-07-09 17:43:51,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1253. [2021-07-09 17:43:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 3.4544728434504792) internal successors, (4325), 1252 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:51,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 4325 transitions. [2021-07-09 17:43:51,279 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 4325 transitions. Word has length 23 [2021-07-09 17:43:51,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:51,279 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 4325 transitions. [2021-07-09 17:43:51,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:51,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 4325 transitions. [2021-07-09 17:43:51,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:43:51,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:51,281 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:51,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5944,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:51,485 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:51,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:51,485 INFO L82 PathProgramCache]: Analyzing trace with hash 995054606, now seen corresponding path program 267 times [2021-07-09 17:43:51,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:51,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118593743] [2021-07-09 17:43:51,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:51,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:51,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118593743] [2021-07-09 17:43:51,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118593743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:51,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846587469] [2021-07-09 17:43:51,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:51,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:43:51,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:51,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:51,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:51,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:51,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:51,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:51,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:43:51,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-07-09 17:43:51,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:51,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:51,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:51,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:51,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:51,854 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:51,887 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:43:51,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:51,890 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:51,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:51,892 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:51,915 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:43:51,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:51,916 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:43:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:43:51,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846587469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:51,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:51,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-07-09 17:43:51,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397678541] [2021-07-09 17:43:51,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:43:51,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:51,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:43:51,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:43:51,950 INFO L87 Difference]: Start difference. First operand 1253 states and 4325 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:53,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:53,373 INFO L93 Difference]: Finished difference Result 1836 states and 5986 transitions. [2021-07-09 17:43:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 17:43:53,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:43:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:53,377 INFO L225 Difference]: With dead ends: 1836 [2021-07-09 17:43:53,377 INFO L226 Difference]: Without dead ends: 1742 [2021-07-09 17:43:53,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1112.4ms TimeCoverageRelationStatistics Valid=448, Invalid=2102, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:43:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2021-07-09 17:43:53,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1236. [2021-07-09 17:43:53,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.473684210526316) internal successors, (4290), 1235 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 4290 transitions. [2021-07-09 17:43:53,393 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 4290 transitions. Word has length 24 [2021-07-09 17:43:53,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:53,394 INFO L482 AbstractCegarLoop]: Abstraction has 1236 states and 4290 transitions. [2021-07-09 17:43:53,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:53,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 4290 transitions. [2021-07-09 17:43:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:43:53,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:53,395 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:53,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6002 [2021-07-09 17:43:53,599 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:53,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:53,599 INFO L82 PathProgramCache]: Analyzing trace with hash -402598, now seen corresponding path program 268 times [2021-07-09 17:43:53,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:53,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579176377] [2021-07-09 17:43:53,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:53,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:53,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579176377] [2021-07-09 17:43:53,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579176377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:53,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676202167] [2021-07-09 17:43:53,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:53,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:43:53,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:53,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:53,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:53,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:53,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:53,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:43:53,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-07-09 17:43:53,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:53,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:53,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:53,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,901 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:43:53,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:53,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:53,906 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:53,928 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:43:53,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:53,929 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:43:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:43:53,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676202167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:53,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:53,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-07-09 17:43:53,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274658145] [2021-07-09 17:43:53,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:43:53,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:53,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:43:53,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:43:53,959 INFO L87 Difference]: Start difference. First operand 1236 states and 4290 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:54,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:54,304 INFO L93 Difference]: Finished difference Result 1658 states and 5527 transitions. [2021-07-09 17:43:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:43:54,304 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:43:54,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:54,307 INFO L225 Difference]: With dead ends: 1658 [2021-07-09 17:43:54,307 INFO L226 Difference]: Without dead ends: 1599 [2021-07-09 17:43:54,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:43:54,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-07-09 17:43:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1258. [2021-07-09 17:43:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 3.484486873508353) internal successors, (4380), 1257 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:54,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 4380 transitions. [2021-07-09 17:43:54,322 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 4380 transitions. Word has length 24 [2021-07-09 17:43:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:54,322 INFO L482 AbstractCegarLoop]: Abstraction has 1258 states and 4380 transitions. [2021-07-09 17:43:54,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 4380 transitions. [2021-07-09 17:43:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:43:54,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:54,324 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:54,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6010,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:54,540 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:54,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2080068998, now seen corresponding path program 269 times [2021-07-09 17:43:54,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:54,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838773592] [2021-07-09 17:43:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:43:54,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:54,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838773592] [2021-07-09 17:43:54,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838773592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:54,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444489000] [2021-07-09 17:43:54,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:54,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:43:54,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:54,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:54,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:54,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:54,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:54,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:54,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:43:54,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-07-09 17:43:54,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:54,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:54,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:54,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:54,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:54,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:54,847 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:43:54,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:54,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:54,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:54,853 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:54,877 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:43:54,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:54,878 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:43:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:43:54,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444489000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:54,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:54,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-07-09 17:43:54,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783955011] [2021-07-09 17:43:54,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:43:54,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:54,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:43:54,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:43:54,921 INFO L87 Difference]: Start difference. First operand 1258 states and 4380 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:55,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:55,343 INFO L93 Difference]: Finished difference Result 1659 states and 5547 transitions. [2021-07-09 17:43:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:43:55,344 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:43:55,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:55,346 INFO L225 Difference]: With dead ends: 1659 [2021-07-09 17:43:55,347 INFO L226 Difference]: Without dead ends: 1600 [2021-07-09 17:43:55,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 308.8ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:43:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-07-09 17:43:55,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1283. [2021-07-09 17:43:55,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.49609984399376) internal successors, (4482), 1282 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:55,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4482 transitions. [2021-07-09 17:43:55,364 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4482 transitions. Word has length 24 [2021-07-09 17:43:55,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:55,364 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4482 transitions. [2021-07-09 17:43:55,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:55,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4482 transitions. [2021-07-09 17:43:55,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:43:55,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:55,365 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:55,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6019,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:55,574 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:55,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1039407654, now seen corresponding path program 270 times [2021-07-09 17:43:55,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:55,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583041520] [2021-07-09 17:43:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:55,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:55,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583041520] [2021-07-09 17:43:55,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583041520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:55,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111494573] [2021-07-09 17:43:55,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:55,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:43:55,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:43:55,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:55,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:55,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:55,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:55,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:55,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:43:55,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-07-09 17:43:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:43:56,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111494573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:56,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:56,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-07-09 17:43:56,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743915122] [2021-07-09 17:43:56,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:43:56,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:56,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:43:56,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:43:56,096 INFO L87 Difference]: Start difference. First operand 1283 states and 4482 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:58,530 INFO L93 Difference]: Finished difference Result 2239 states and 7277 transitions. [2021-07-09 17:43:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:43:58,530 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:43:58,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:58,534 INFO L225 Difference]: With dead ends: 2239 [2021-07-09 17:43:58,534 INFO L226 Difference]: Without dead ends: 2113 [2021-07-09 17:43:58,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1954.0ms TimeCoverageRelationStatistics Valid=491, Invalid=2931, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 17:43:58,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-07-09 17:43:58,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1282. [2021-07-09 17:43:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.501951600312256) internal successors, (4486), 1281 states have internal predecessors, (4486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4486 transitions. [2021-07-09 17:43:58,552 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4486 transitions. Word has length 24 [2021-07-09 17:43:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:58,552 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4486 transitions. [2021-07-09 17:43:58,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4486 transitions. [2021-07-09 17:43:58,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:43:58,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:58,554 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:58,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6027,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:58,770 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:58,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:58,770 INFO L82 PathProgramCache]: Analyzing trace with hash -794804850, now seen corresponding path program 271 times [2021-07-09 17:43:58,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:58,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096177859] [2021-07-09 17:43:58,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:58,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:58,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096177859] [2021-07-09 17:43:58,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096177859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:58,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354519464] [2021-07-09 17:43:58,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:43:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:58,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:43:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:43:58,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:43:58,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:59,008 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-07-09 17:43:59,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:43:59,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:59,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:43:59,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:59,019 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:22 [2021-07-09 17:43:59,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:59,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:59,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:59,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:59,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:59,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:59,106 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:43:59,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:43:59,109 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:59,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:43:59,111 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:43:59,136 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:43:59,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:43:59,136 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:43:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:43:59,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354519464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:59,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:43:59,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:43:59,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285727652] [2021-07-09 17:43:59,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:43:59,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:43:59,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:43:59,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:43:59,183 INFO L87 Difference]: Start difference. First operand 1282 states and 4486 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:43:59,617 INFO L93 Difference]: Finished difference Result 1579 states and 5362 transitions. [2021-07-09 17:43:59,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:43:59,617 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:43:59,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:43:59,620 INFO L225 Difference]: With dead ends: 1579 [2021-07-09 17:43:59,620 INFO L226 Difference]: Without dead ends: 1528 [2021-07-09 17:43:59,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 378.0ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:43:59,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-07-09 17:43:59,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1318. [2021-07-09 17:43:59,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.507972665148064) internal successors, (4620), 1317 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4620 transitions. [2021-07-09 17:43:59,635 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4620 transitions. Word has length 24 [2021-07-09 17:43:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:43:59,635 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 4620 transitions. [2021-07-09 17:43:59,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:43:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4620 transitions. [2021-07-09 17:43:59,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:43:59,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:43:59,637 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:43:59,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6063 [2021-07-09 17:43:59,853 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:43:59,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:43:59,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1285666746, now seen corresponding path program 272 times [2021-07-09 17:43:59,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:43:59,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518245277] [2021-07-09 17:43:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:43:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:43:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:43:59,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:43:59,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518245277] [2021-07-09 17:43:59,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518245277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:43:59,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979489769] [2021-07-09 17:43:59,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:00,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:00,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:00,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:00,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:00,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:44:00,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:00,120 INFO L628 ElimStorePlain]: treesize reduction 2, result has 91.7 percent of original size [2021-07-09 17:44:00,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:00,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:22 [2021-07-09 17:44:00,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:00,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:00,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:00,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:00,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:00,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:00,234 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:44:00,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:00,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:00,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:00,240 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:00,264 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:44:00,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:00,265 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:44:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:00,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979489769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:00,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:00,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 17:44:00,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644814027] [2021-07-09 17:44:00,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:00,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:00,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:00,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:00,312 INFO L87 Difference]: Start difference. First operand 1318 states and 4620 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:00,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:00,802 INFO L93 Difference]: Finished difference Result 1678 states and 5684 transitions. [2021-07-09 17:44:00,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:44:00,802 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:00,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:00,805 INFO L225 Difference]: With dead ends: 1678 [2021-07-09 17:44:00,805 INFO L226 Difference]: Without dead ends: 1627 [2021-07-09 17:44:00,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 368.1ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:44:00,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-07-09 17:44:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1343. [2021-07-09 17:44:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 3.518628912071535) internal successors, (4722), 1342 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 4722 transitions. [2021-07-09 17:44:00,821 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 4722 transitions. Word has length 24 [2021-07-09 17:44:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:00,822 INFO L482 AbstractCegarLoop]: Abstraction has 1343 states and 4722 transitions. [2021-07-09 17:44:00,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 4722 transitions. [2021-07-09 17:44:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:00,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:00,823 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:01,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6069 [2021-07-09 17:44:01,039 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:01,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:01,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1833809906, now seen corresponding path program 273 times [2021-07-09 17:44:01,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:01,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447343700] [2021-07-09 17:44:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:01,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:01,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447343700] [2021-07-09 17:44:01,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447343700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:01,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851847897] [2021-07-09 17:44:01,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:01,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:44:01,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:01,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:01,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:01,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:44:01,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:01,313 INFO L628 ElimStorePlain]: treesize reduction 2, result has 91.7 percent of original size [2021-07-09 17:44:01,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:01,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:22 [2021-07-09 17:44:01,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:01,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:01,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:01,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:01,475 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:01,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:01,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:01,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:01,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:01,482 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:01,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:01,485 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:01,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:01,488 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:01,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:01,491 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:01,559 INFO L628 ElimStorePlain]: treesize reduction 20, result has 80.4 percent of original size [2021-07-09 17:44:01,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:01,563 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:01,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:01,566 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:01,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:01,570 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:01,615 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.4 percent of original size [2021-07-09 17:44:01,615 INFO L518 ElimStorePlain]: Eliminatee v_prenex_215 vanished before elimination [2021-07-09 17:44:01,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:44:01,616 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:201, output treesize:34 [2021-07-09 17:44:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:01,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851847897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:01,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:01,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 17:44:01,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822015777] [2021-07-09 17:44:01,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:01,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:01,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:01,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:01,699 INFO L87 Difference]: Start difference. First operand 1343 states and 4722 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:02,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:02,139 INFO L93 Difference]: Finished difference Result 1761 states and 5948 transitions. [2021-07-09 17:44:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:44:02,139 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:02,142 INFO L225 Difference]: With dead ends: 1761 [2021-07-09 17:44:02,142 INFO L226 Difference]: Without dead ends: 1710 [2021-07-09 17:44:02,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:44:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-07-09 17:44:02,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1371. [2021-07-09 17:44:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 3.55036496350365) internal successors, (4864), 1370 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 4864 transitions. [2021-07-09 17:44:02,160 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 4864 transitions. Word has length 24 [2021-07-09 17:44:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:02,160 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 4864 transitions. [2021-07-09 17:44:02,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:02,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 4864 transitions. [2021-07-09 17:44:02,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:02,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:02,162 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:02,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6079 [2021-07-09 17:44:02,364 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:02,364 INFO L82 PathProgramCache]: Analyzing trace with hash -220243172, now seen corresponding path program 274 times [2021-07-09 17:44:02,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:02,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942881029] [2021-07-09 17:44:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:02,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:02,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942881029] [2021-07-09 17:44:02,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942881029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:02,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475485382] [2021-07-09 17:44:02,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:02,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:44:02,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:02,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:02,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:02,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:02,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,666 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-07-09 17:44:02,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:44:02,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:02,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:02,678 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:22 [2021-07-09 17:44:02,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:02,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:02,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:02,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:02,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:02,835 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,837 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:02,838 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:02,841 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,843 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:02,844 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,914 INFO L628 ElimStorePlain]: treesize reduction 42, result has 66.4 percent of original size [2021-07-09 17:44:02,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:02,918 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:02,922 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:02,987 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.1 percent of original size [2021-07-09 17:44:02,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:02,991 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:03,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:03,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:03,025 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:03,070 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.8 percent of original size [2021-07-09 17:44:03,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:44:03,071 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-07-09 17:44:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:03,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475485382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:03,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:03,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 17:44:03,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989831257] [2021-07-09 17:44:03,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:03,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:03,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:03,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:03,150 INFO L87 Difference]: Start difference. First operand 1371 states and 4864 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:03,637 INFO L93 Difference]: Finished difference Result 1701 states and 5782 transitions. [2021-07-09 17:44:03,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:44:03,637 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:03,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:03,640 INFO L225 Difference]: With dead ends: 1701 [2021-07-09 17:44:03,640 INFO L226 Difference]: Without dead ends: 1638 [2021-07-09 17:44:03,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 515.9ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:44:03,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-07-09 17:44:03,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1296. [2021-07-09 17:44:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.498069498069498) internal successors, (4530), 1295 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:03,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 4530 transitions. [2021-07-09 17:44:03,656 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 4530 transitions. Word has length 24 [2021-07-09 17:44:03,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:03,656 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 4530 transitions. [2021-07-09 17:44:03,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:03,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 4530 transitions. [2021-07-09 17:44:03,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:03,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:03,658 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:03,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6124 [2021-07-09 17:44:03,874 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:03,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:03,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1355776782, now seen corresponding path program 275 times [2021-07-09 17:44:03,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:03,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694580181] [2021-07-09 17:44:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:03,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:03,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694580181] [2021-07-09 17:44:03,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694580181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:03,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779821111] [2021-07-09 17:44:03,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:04,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:44:04,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:04,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:04,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:04,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:04,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:04,144 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-07-09 17:44:04,145 INFO L518 ElimStorePlain]: Eliminatee v_prenex_219 vanished before elimination [2021-07-09 17:44:04,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:04,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-07-09 17:44:04,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:04,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:04,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:04,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:04,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:04,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:04,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:04,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:04,214 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:04,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:04,216 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:04,239 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:44:04,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:04,240 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:44:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:04,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779821111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:04,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:04,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:44:04,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956619371] [2021-07-09 17:44:04,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:44:04,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:04,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:44:04,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:44:04,273 INFO L87 Difference]: Start difference. First operand 1296 states and 4530 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:04,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:04,664 INFO L93 Difference]: Finished difference Result 1571 states and 5344 transitions. [2021-07-09 17:44:04,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:44:04,665 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:04,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:04,667 INFO L225 Difference]: With dead ends: 1571 [2021-07-09 17:44:04,667 INFO L226 Difference]: Without dead ends: 1520 [2021-07-09 17:44:04,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 306.2ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:44:04,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-09 17:44:04,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1335. [2021-07-09 17:44:04,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.505247376311844) internal successors, (4676), 1334 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4676 transitions. [2021-07-09 17:44:04,683 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4676 transitions. Word has length 24 [2021-07-09 17:44:04,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:04,683 INFO L482 AbstractCegarLoop]: Abstraction has 1335 states and 4676 transitions. [2021-07-09 17:44:04,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:04,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4676 transitions. [2021-07-09 17:44:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:04,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:04,685 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:04,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6168 [2021-07-09 17:44:04,901 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:04,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:04,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1763699870, now seen corresponding path program 276 times [2021-07-09 17:44:04,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:04,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065092938] [2021-07-09 17:44:04,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:05,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:05,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065092938] [2021-07-09 17:44:05,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065092938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:05,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201785887] [2021-07-09 17:44:05,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:05,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:44:05,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:05,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:05,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:05,131 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:05,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:05,151 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-07-09 17:44:05,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:05,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:05,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:05,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:05,162 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-07-09 17:44:05,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:05,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:05,338 INFO L628 ElimStorePlain]: treesize reduction 49, result has 65.7 percent of original size [2021-07-09 17:44:05,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:05,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:05,406 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-07-09 17:44:05,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:05,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:05,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:05,412 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:05,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:05,415 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:05,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:05,418 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:05,469 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.3 percent of original size [2021-07-09 17:44:05,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:05,474 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:05,511 INFO L628 ElimStorePlain]: treesize reduction 16, result has 76.8 percent of original size [2021-07-09 17:44:05,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:05,514 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:05,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:05,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:44:05,532 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:146, output treesize:34 [2021-07-09 17:44:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:05,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201785887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:05,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:05,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 17:44:05,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157729249] [2021-07-09 17:44:05,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:05,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:05,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:05,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:05,597 INFO L87 Difference]: Start difference. First operand 1335 states and 4676 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:06,002 INFO L93 Difference]: Finished difference Result 1723 states and 5814 transitions. [2021-07-09 17:44:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:44:06,002 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:06,005 INFO L225 Difference]: With dead ends: 1723 [2021-07-09 17:44:06,005 INFO L226 Difference]: Without dead ends: 1672 [2021-07-09 17:44:06,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:44:06,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-07-09 17:44:06,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1363. [2021-07-09 17:44:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.537444933920705) internal successors, (4818), 1362 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4818 transitions. [2021-07-09 17:44:06,034 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4818 transitions. Word has length 24 [2021-07-09 17:44:06,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:06,035 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4818 transitions. [2021-07-09 17:44:06,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4818 transitions. [2021-07-09 17:44:06,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:06,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:06,036 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:06,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6174 [2021-07-09 17:44:06,253 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:06,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:06,253 INFO L82 PathProgramCache]: Analyzing trace with hash -150133136, now seen corresponding path program 277 times [2021-07-09 17:44:06,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:06,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247223746] [2021-07-09 17:44:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:06,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:06,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247223746] [2021-07-09 17:44:06,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247223746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:06,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386908490] [2021-07-09 17:44:06,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:06,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:06,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:06,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:06,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,605 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-07-09 17:44:06,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:06,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:06,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:06,616 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-07-09 17:44:06,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:06,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:06,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:06,759 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:06,763 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:06,766 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:06,769 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:06,772 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,775 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:06,775 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,777 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:06,778 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,856 INFO L628 ElimStorePlain]: treesize reduction 24, result has 81.1 percent of original size [2021-07-09 17:44:06,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:06,859 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,904 INFO L628 ElimStorePlain]: treesize reduction 40, result has 59.6 percent of original size [2021-07-09 17:44:06,905 INFO L518 ElimStorePlain]: Eliminatee v_prenex_227 vanished before elimination [2021-07-09 17:44:06,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:06,907 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:06,910 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:06,943 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.2 percent of original size [2021-07-09 17:44:06,943 INFO L518 ElimStorePlain]: Eliminatee v_prenex_226 vanished before elimination [2021-07-09 17:44:06,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:44:06,945 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:224, output treesize:34 [2021-07-09 17:44:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:07,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386908490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:07,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:07,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 17:44:07,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043674198] [2021-07-09 17:44:07,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:07,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:07,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:07,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:07,009 INFO L87 Difference]: Start difference. First operand 1363 states and 4818 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:07,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:07,416 INFO L93 Difference]: Finished difference Result 1653 states and 5622 transitions. [2021-07-09 17:44:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:44:07,416 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:07,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:07,419 INFO L225 Difference]: With dead ends: 1653 [2021-07-09 17:44:07,419 INFO L226 Difference]: Without dead ends: 1590 [2021-07-09 17:44:07,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 387.8ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:44:07,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2021-07-09 17:44:07,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1310. [2021-07-09 17:44:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 3.4935064935064934) internal successors, (4573), 1309 states have internal predecessors, (4573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:07,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 4573 transitions. [2021-07-09 17:44:07,436 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 4573 transitions. Word has length 24 [2021-07-09 17:44:07,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:07,436 INFO L482 AbstractCegarLoop]: Abstraction has 1310 states and 4573 transitions. [2021-07-09 17:44:07,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:07,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 4573 transitions. [2021-07-09 17:44:07,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:07,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:07,438 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:07,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6193,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:07,654 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:07,655 INFO L82 PathProgramCache]: Analyzing trace with hash 316771726, now seen corresponding path program 278 times [2021-07-09 17:44:07,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:07,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735835474] [2021-07-09 17:44:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:07,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:07,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735835474] [2021-07-09 17:44:07,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735835474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:07,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138582677] [2021-07-09 17:44:07,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:07,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:07,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:07,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:07,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:08,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138582677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:08,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:08,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-09 17:44:08,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087061009] [2021-07-09 17:44:08,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:44:08,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:08,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:44:08,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:44:08,187 INFO L87 Difference]: Start difference. First operand 1310 states and 4573 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:10,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:10,555 INFO L93 Difference]: Finished difference Result 2070 states and 6696 transitions. [2021-07-09 17:44:10,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 17:44:10,556 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:10,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:10,572 INFO L225 Difference]: With dead ends: 2070 [2021-07-09 17:44:10,572 INFO L226 Difference]: Without dead ends: 1863 [2021-07-09 17:44:10,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 1932.6ms TimeCoverageRelationStatistics Valid=464, Invalid=3568, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 17:44:10,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-07-09 17:44:10,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1361. [2021-07-09 17:44:10,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.522794117647059) internal successors, (4791), 1360 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4791 transitions. [2021-07-09 17:44:10,604 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4791 transitions. Word has length 24 [2021-07-09 17:44:10,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:10,604 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4791 transitions. [2021-07-09 17:44:10,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:10,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4791 transitions. [2021-07-09 17:44:10,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:10,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:10,606 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:10,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6228,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:10,823 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:10,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:10,823 INFO L82 PathProgramCache]: Analyzing trace with hash 856040988, now seen corresponding path program 279 times [2021-07-09 17:44:10,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:10,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098853469] [2021-07-09 17:44:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:10,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:10,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098853469] [2021-07-09 17:44:10,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098853469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:10,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224239350] [2021-07-09 17:44:10,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:11,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:44:11,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:11,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:11,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:11,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:11,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:11,159 INFO L628 ElimStorePlain]: treesize reduction 56, result has 61.1 percent of original size [2021-07-09 17:44:11,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:11,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:11,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:11,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:11,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:11,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:11,222 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-07-09 17:44:11,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:44:11,223 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:147, output treesize:58 [2021-07-09 17:44:11,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:11,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:11,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:11,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:11,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:11,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:11,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:11,314 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:11,381 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-07-09 17:44:11,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:11,385 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:11,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:11,388 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:11,445 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-07-09 17:44:11,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:11,446 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-07-09 17:44:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:44:11,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224239350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:11,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:11,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 17:44:11,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936037055] [2021-07-09 17:44:11,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:11,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:11,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:11,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:11,544 INFO L87 Difference]: Start difference. First operand 1361 states and 4791 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:12,583 INFO L93 Difference]: Finished difference Result 1718 states and 5748 transitions. [2021-07-09 17:44:12,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:44:12,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:12,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:12,586 INFO L225 Difference]: With dead ends: 1718 [2021-07-09 17:44:12,586 INFO L226 Difference]: Without dead ends: 1655 [2021-07-09 17:44:12,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 934.2ms TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:44:12,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-07-09 17:44:12,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1342. [2021-07-09 17:44:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 3.4966442953020134) internal successors, (4689), 1341 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:12,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 4689 transitions. [2021-07-09 17:44:12,605 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 4689 transitions. Word has length 24 [2021-07-09 17:44:12,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:12,605 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 4689 transitions. [2021-07-09 17:44:12,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:12,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 4689 transitions. [2021-07-09 17:44:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:12,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:12,607 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:12,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6250 [2021-07-09 17:44:12,821 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:12,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:12,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1348636750, now seen corresponding path program 280 times [2021-07-09 17:44:12,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:12,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677197779] [2021-07-09 17:44:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:13,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:13,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677197779] [2021-07-09 17:44:13,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677197779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:13,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172225987] [2021-07-09 17:44:13,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:13,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:44:13,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:13,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:13,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:44:13,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172225987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:13,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:13,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-09 17:44:13,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149689999] [2021-07-09 17:44:13,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:44:13,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:13,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:44:13,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:44:13,409 INFO L87 Difference]: Start difference. First operand 1342 states and 4689 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:17,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:17,665 INFO L93 Difference]: Finished difference Result 2255 states and 7301 transitions. [2021-07-09 17:44:17,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 17:44:17,665 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:17,669 INFO L225 Difference]: With dead ends: 2255 [2021-07-09 17:44:17,669 INFO L226 Difference]: Without dead ends: 2058 [2021-07-09 17:44:17,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 3807.4ms TimeCoverageRelationStatistics Valid=801, Invalid=4601, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 17:44:17,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-07-09 17:44:17,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1333. [2021-07-09 17:44:17,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 3.4977477477477477) internal successors, (4659), 1332 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 4659 transitions. [2021-07-09 17:44:17,690 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 4659 transitions. Word has length 24 [2021-07-09 17:44:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:17,690 INFO L482 AbstractCegarLoop]: Abstraction has 1333 states and 4659 transitions. [2021-07-09 17:44:17,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 4659 transitions. [2021-07-09 17:44:17,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:17,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:17,691 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:17,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6266 [2021-07-09 17:44:17,905 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:17,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:17,905 INFO L82 PathProgramCache]: Analyzing trace with hash 257555664, now seen corresponding path program 281 times [2021-07-09 17:44:17,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:17,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842040215] [2021-07-09 17:44:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:18,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:18,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842040215] [2021-07-09 17:44:18,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842040215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:18,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60694093] [2021-07-09 17:44:18,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:18,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:44:18,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:18,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:44:18,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:44:18,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60694093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:18,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:18,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-09 17:44:18,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744901081] [2021-07-09 17:44:18,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:44:18,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:18,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:44:18,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:44:18,380 INFO L87 Difference]: Start difference. First operand 1333 states and 4659 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:22,541 INFO L93 Difference]: Finished difference Result 2603 states and 8192 transitions. [2021-07-09 17:44:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 17:44:22,541 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:22,545 INFO L225 Difference]: With dead ends: 2603 [2021-07-09 17:44:22,545 INFO L226 Difference]: Without dead ends: 2202 [2021-07-09 17:44:22,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 3678.3ms TimeCoverageRelationStatistics Valid=681, Invalid=4721, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 17:44:22,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-07-09 17:44:22,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1438. [2021-07-09 17:44:22,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.405010438413361) internal successors, (4893), 1437 states have internal predecessors, (4893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:22,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4893 transitions. [2021-07-09 17:44:22,566 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4893 transitions. Word has length 24 [2021-07-09 17:44:22,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:22,566 INFO L482 AbstractCegarLoop]: Abstraction has 1438 states and 4893 transitions. [2021-07-09 17:44:22,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:22,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4893 transitions. [2021-07-09 17:44:22,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:22,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:22,568 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:22,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6286 [2021-07-09 17:44:22,772 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:22,773 INFO L82 PathProgramCache]: Analyzing trace with hash 668428116, now seen corresponding path program 282 times [2021-07-09 17:44:22,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:22,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655746063] [2021-07-09 17:44:22,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:22,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:22,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655746063] [2021-07-09 17:44:22,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655746063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:22,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173161652] [2021-07-09 17:44:22,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:23,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:44:23,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:23,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:44:23,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:23,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:23,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:23,146 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.0 percent of original size [2021-07-09 17:44:23,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:23,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:23,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:23,181 INFO L518 ElimStorePlain]: Eliminatee v_prenex_229 vanished before elimination [2021-07-09 17:44:23,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:23,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:23,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:23,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:44:23,218 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:142, output treesize:68 [2021-07-09 17:44:23,568 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_233, ends_with_10], 1=[ends_with_6]} [2021-07-09 17:44:23,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:23,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:23,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:23,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:23,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:23,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:23,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:23,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:23,584 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:23,585 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:23,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:23,587 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:23,699 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-07-09 17:44:23,699 INFO L628 ElimStorePlain]: treesize reduction 70, result has 63.9 percent of original size [2021-07-09 17:44:23,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:23,703 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:23,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:23,706 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:23,772 INFO L628 ElimStorePlain]: treesize reduction 50, result has 57.6 percent of original size [2021-07-09 17:44:23,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:23,775 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:23,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:23,779 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:23,816 INFO L628 ElimStorePlain]: treesize reduction 20, result has 67.2 percent of original size [2021-07-09 17:44:23,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:23,818 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:303, output treesize:20 [2021-07-09 17:44:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:44:23,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173161652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:23,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:23,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-09 17:44:23,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107244718] [2021-07-09 17:44:23,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:44:23,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:23,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:44:23,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:44:23,875 INFO L87 Difference]: Start difference. First operand 1438 states and 4893 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:25,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:25,854 INFO L93 Difference]: Finished difference Result 1986 states and 6506 transitions. [2021-07-09 17:44:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:44:25,854 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:25,857 INFO L225 Difference]: With dead ends: 1986 [2021-07-09 17:44:25,857 INFO L226 Difference]: Without dead ends: 1869 [2021-07-09 17:44:25,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1489.9ms TimeCoverageRelationStatistics Valid=325, Invalid=2225, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:44:25,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-07-09 17:44:25,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1539. [2021-07-09 17:44:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 3.4213263979193758) internal successors, (5262), 1538 states have internal predecessors, (5262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:25,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 5262 transitions. [2021-07-09 17:44:25,876 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 5262 transitions. Word has length 24 [2021-07-09 17:44:25,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:25,876 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 5262 transitions. [2021-07-09 17:44:25,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:25,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 5262 transitions. [2021-07-09 17:44:25,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:25,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:25,878 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:26,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6294,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:26,080 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:26,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1920773996, now seen corresponding path program 283 times [2021-07-09 17:44:26,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:26,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995448574] [2021-07-09 17:44:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:44:26,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:26,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995448574] [2021-07-09 17:44:26,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995448574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:26,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767581328] [2021-07-09 17:44:26,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:26,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:44:26,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:44:26,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767581328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:26,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:26,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-07-09 17:44:26,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343345154] [2021-07-09 17:44:26,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:44:26,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:26,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:44:26,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:44:26,543 INFO L87 Difference]: Start difference. First operand 1539 states and 5262 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:30,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:30,418 INFO L93 Difference]: Finished difference Result 3301 states and 10511 transitions. [2021-07-09 17:44:30,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 17:44:30,419 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:30,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:30,425 INFO L225 Difference]: With dead ends: 3301 [2021-07-09 17:44:30,425 INFO L226 Difference]: Without dead ends: 3123 [2021-07-09 17:44:30,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 3295.2ms TimeCoverageRelationStatistics Valid=843, Invalid=5319, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 17:44:30,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-07-09 17:44:30,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 1630. [2021-07-09 17:44:30,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.481890730509515) internal successors, (5672), 1629 states have internal predecessors, (5672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:30,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5672 transitions. [2021-07-09 17:44:30,453 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5672 transitions. Word has length 24 [2021-07-09 17:44:30,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:30,453 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 5672 transitions. [2021-07-09 17:44:30,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:30,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5672 transitions. [2021-07-09 17:44:30,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:30,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:30,456 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:30,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6348 [2021-07-09 17:44:30,661 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:30,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:30,661 INFO L82 PathProgramCache]: Analyzing trace with hash -235535934, now seen corresponding path program 284 times [2021-07-09 17:44:30,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:30,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802634207] [2021-07-09 17:44:30,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:30,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:30,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802634207] [2021-07-09 17:44:30,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802634207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:30,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968767249] [2021-07-09 17:44:30,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:30,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:30,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:30,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:44:30,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:44:30,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968767249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:30,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:30,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-09 17:44:30,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318295595] [2021-07-09 17:44:30,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:44:30,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:30,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:44:30,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:44:30,975 INFO L87 Difference]: Start difference. First operand 1630 states and 5672 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:31,965 INFO L93 Difference]: Finished difference Result 2215 states and 7479 transitions. [2021-07-09 17:44:31,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:44:31,965 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:31,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:31,969 INFO L225 Difference]: With dead ends: 2215 [2021-07-09 17:44:31,969 INFO L226 Difference]: Without dead ends: 2163 [2021-07-09 17:44:31,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 551.1ms TimeCoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:44:31,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-07-09 17:44:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1718. [2021-07-09 17:44:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.4857309260337797) internal successors, (5985), 1717 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5985 transitions. [2021-07-09 17:44:31,990 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5985 transitions. Word has length 24 [2021-07-09 17:44:31,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:31,990 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 5985 transitions. [2021-07-09 17:44:31,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:31,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5985 transitions. [2021-07-09 17:44:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:31,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:31,993 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:32,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6356 [2021-07-09 17:44:32,209 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:32,209 INFO L82 PathProgramCache]: Analyzing trace with hash -458096300, now seen corresponding path program 285 times [2021-07-09 17:44:32,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:32,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169237595] [2021-07-09 17:44:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:32,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:32,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169237595] [2021-07-09 17:44:32,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169237595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:32,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772849766] [2021-07-09 17:44:32,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:32,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:44:32,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:32,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:44:32,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:32,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:32,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:32,565 INFO L628 ElimStorePlain]: treesize reduction 31, result has 77.7 percent of original size [2021-07-09 17:44:32,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:32,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:32,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:32,612 INFO L518 ElimStorePlain]: Eliminatee v_prenex_236 vanished before elimination [2021-07-09 17:44:32,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:32,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:32,684 INFO L628 ElimStorePlain]: treesize reduction 24, result has 76.0 percent of original size [2021-07-09 17:44:32,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:32,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:32,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:32,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:44:32,721 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:142, output treesize:68 [2021-07-09 17:44:33,063 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_10, v_prenex_239], 1=[ends_with_6]} [2021-07-09 17:44:33,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:33,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:33,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:33,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:33,168 INFO L628 ElimStorePlain]: treesize reduction 273, result has 26.8 percent of original size [2021-07-09 17:44:33,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:33,171 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:33,232 INFO L628 ElimStorePlain]: treesize reduction 26, result has 72.9 percent of original size [2021-07-09 17:44:33,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:33,235 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:33,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:33,239 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:33,275 INFO L628 ElimStorePlain]: treesize reduction 20, result has 68.3 percent of original size [2021-07-09 17:44:33,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:33,277 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:379, output treesize:20 [2021-07-09 17:44:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:44:33,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772849766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:33,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:33,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2021-07-09 17:44:33,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943249215] [2021-07-09 17:44:33,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:44:33,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:33,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:44:33,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:44:33,333 INFO L87 Difference]: Start difference. First operand 1718 states and 5985 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:34,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:34,999 INFO L93 Difference]: Finished difference Result 2520 states and 8276 transitions. [2021-07-09 17:44:34,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:44:34,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:34,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:35,004 INFO L225 Difference]: With dead ends: 2520 [2021-07-09 17:44:35,004 INFO L226 Difference]: Without dead ends: 2369 [2021-07-09 17:44:35,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1268.7ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:44:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-07-09 17:44:35,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 1751. [2021-07-09 17:44:35,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 3.4937142857142858) internal successors, (6114), 1750 states have internal predecessors, (6114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:35,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 6114 transitions. [2021-07-09 17:44:35,029 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 6114 transitions. Word has length 24 [2021-07-09 17:44:35,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:35,029 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 6114 transitions. [2021-07-09 17:44:35,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:35,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 6114 transitions. [2021-07-09 17:44:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:35,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:35,031 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:35,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6359,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:35,245 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:35,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:35,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2039999204, now seen corresponding path program 286 times [2021-07-09 17:44:35,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:35,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705838821] [2021-07-09 17:44:35,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:35,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:35,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705838821] [2021-07-09 17:44:35,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705838821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:35,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995463543] [2021-07-09 17:44:35,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:35,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:44:35,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:35,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:44:35,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:35,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995463543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:35,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:35,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-09 17:44:35,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677869915] [2021-07-09 17:44:35,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:44:35,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:35,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:44:35,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:44:35,750 INFO L87 Difference]: Start difference. First operand 1751 states and 6114 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:39,523 INFO L93 Difference]: Finished difference Result 3157 states and 10097 transitions. [2021-07-09 17:44:39,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 17:44:39,523 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:39,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:39,528 INFO L225 Difference]: With dead ends: 3157 [2021-07-09 17:44:39,528 INFO L226 Difference]: Without dead ends: 2874 [2021-07-09 17:44:39,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 3301.6ms TimeCoverageRelationStatistics Valid=618, Invalid=4638, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 17:44:39,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2021-07-09 17:44:39,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 1764. [2021-07-09 17:44:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.4951786727169596) internal successors, (6162), 1763 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:39,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 6162 transitions. [2021-07-09 17:44:39,558 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 6162 transitions. Word has length 24 [2021-07-09 17:44:39,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:39,558 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 6162 transitions. [2021-07-09 17:44:39,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:39,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 6162 transitions. [2021-07-09 17:44:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:39,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:39,560 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:39,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6443 [2021-07-09 17:44:39,777 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:39,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:39,777 INFO L82 PathProgramCache]: Analyzing trace with hash 133379628, now seen corresponding path program 287 times [2021-07-09 17:44:39,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:39,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529747175] [2021-07-09 17:44:39,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:44:39,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:39,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529747175] [2021-07-09 17:44:39,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529747175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:39,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609982395] [2021-07-09 17:44:39,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:40,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:44:40,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:40,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:44:40,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:40,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609982395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:40,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:40,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-09 17:44:40,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225654546] [2021-07-09 17:44:40,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:44:40,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:40,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:44:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:44:40,279 INFO L87 Difference]: Start difference. First operand 1764 states and 6162 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:45,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:45,098 INFO L93 Difference]: Finished difference Result 3655 states and 11498 transitions. [2021-07-09 17:44:45,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 17:44:45,098 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:45,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:45,105 INFO L225 Difference]: With dead ends: 3655 [2021-07-09 17:44:45,105 INFO L226 Difference]: Without dead ends: 3430 [2021-07-09 17:44:45,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 4031.8ms TimeCoverageRelationStatistics Valid=873, Invalid=6609, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 17:44:45,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2021-07-09 17:44:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 1749. [2021-07-09 17:44:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.482265446224256) internal successors, (6087), 1748 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:45,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6087 transitions. [2021-07-09 17:44:45,137 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6087 transitions. Word has length 24 [2021-07-09 17:44:45,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:45,137 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 6087 transitions. [2021-07-09 17:44:45,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:45,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6087 transitions. [2021-07-09 17:44:45,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:45,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:45,140 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:45,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6449,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:45,356 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:45,356 INFO L82 PathProgramCache]: Analyzing trace with hash -269481576, now seen corresponding path program 288 times [2021-07-09 17:44:45,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:45,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28155424] [2021-07-09 17:44:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:45,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:45,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28155424] [2021-07-09 17:44:45,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28155424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:45,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619936888] [2021-07-09 17:44:45,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:45,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:44:45,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:45,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:44:45,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:45,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619936888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:45,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:45,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-09 17:44:45,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736871734] [2021-07-09 17:44:45,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:44:45,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:45,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:44:45,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:44:45,803 INFO L87 Difference]: Start difference. First operand 1749 states and 6087 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:48,047 INFO L93 Difference]: Finished difference Result 2734 states and 8909 transitions. [2021-07-09 17:44:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 17:44:48,047 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:48,052 INFO L225 Difference]: With dead ends: 2734 [2021-07-09 17:44:48,052 INFO L226 Difference]: Without dead ends: 2513 [2021-07-09 17:44:48,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1798.3ms TimeCoverageRelationStatistics Valid=387, Invalid=2919, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 17:44:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-07-09 17:44:48,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1670. [2021-07-09 17:44:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4703415218693827) internal successors, (5792), 1669 states have internal predecessors, (5792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:48,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5792 transitions. [2021-07-09 17:44:48,077 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5792 transitions. Word has length 24 [2021-07-09 17:44:48,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:48,077 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5792 transitions. [2021-07-09 17:44:48,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:48,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5792 transitions. [2021-07-09 17:44:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:48,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:48,079 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:48,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6459 [2021-07-09 17:44:48,293 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:48,293 INFO L82 PathProgramCache]: Analyzing trace with hash 348529114, now seen corresponding path program 289 times [2021-07-09 17:44:48,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:48,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681624420] [2021-07-09 17:44:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:48,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:48,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681624420] [2021-07-09 17:44:48,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681624420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:48,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022269391] [2021-07-09 17:44:48,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:48,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:48,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:48,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:48,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:48,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:48,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:48,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:48,566 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:48,600 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:44:48,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:48,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:48,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:48,605 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:48,631 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:44:48,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:48,632 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:44:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:48,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022269391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:48,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:48,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-07-09 17:44:48,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254344622] [2021-07-09 17:44:48,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:44:48,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:48,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:44:48,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:44:48,678 INFO L87 Difference]: Start difference. First operand 1670 states and 5792 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:49,112 INFO L93 Difference]: Finished difference Result 1982 states and 6731 transitions. [2021-07-09 17:44:49,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:44:49,112 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:49,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:49,115 INFO L225 Difference]: With dead ends: 1982 [2021-07-09 17:44:49,115 INFO L226 Difference]: Without dead ends: 1904 [2021-07-09 17:44:49,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:44:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2021-07-09 17:44:49,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1686. [2021-07-09 17:44:49,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.4735905044510385) internal successors, (5853), 1685 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:49,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5853 transitions. [2021-07-09 17:44:49,136 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5853 transitions. Word has length 24 [2021-07-09 17:44:49,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:49,136 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5853 transitions. [2021-07-09 17:44:49,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:49,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5853 transitions. [2021-07-09 17:44:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:49,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:49,139 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:49,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6467,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:49,355 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:49,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:49,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1865966586, now seen corresponding path program 290 times [2021-07-09 17:44:49,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:49,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641129478] [2021-07-09 17:44:49,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:49,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:49,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:49,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641129478] [2021-07-09 17:44:49,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641129478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:49,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708729177] [2021-07-09 17:44:49,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:49,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:49,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:49,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:49,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:49,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:49,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:49,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:49,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:49,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:49,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:49,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:49,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:49,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:49,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:49,701 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:49,725 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:44:49,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:49,726 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:44:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:49,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708729177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:49,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:49,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-07-09 17:44:49,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716805906] [2021-07-09 17:44:49,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:44:49,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:49,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:44:49,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:44:49,768 INFO L87 Difference]: Start difference. First operand 1686 states and 5853 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:50,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:50,190 INFO L93 Difference]: Finished difference Result 2113 states and 7151 transitions. [2021-07-09 17:44:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:44:50,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:50,194 INFO L225 Difference]: With dead ends: 2113 [2021-07-09 17:44:50,194 INFO L226 Difference]: Without dead ends: 2044 [2021-07-09 17:44:50,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 343.6ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:44:50,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-07-09 17:44:50,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1716. [2021-07-09 17:44:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.4816326530612245) internal successors, (5971), 1715 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5971 transitions. [2021-07-09 17:44:50,214 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5971 transitions. Word has length 24 [2021-07-09 17:44:50,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:50,215 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 5971 transitions. [2021-07-09 17:44:50,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:50,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5971 transitions. [2021-07-09 17:44:50,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:50,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:50,217 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:50,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6474 [2021-07-09 17:44:50,433 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:50,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:50,434 INFO L82 PathProgramCache]: Analyzing trace with hash -690475942, now seen corresponding path program 291 times [2021-07-09 17:44:50,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:50,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658502531] [2021-07-09 17:44:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:50,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:50,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658502531] [2021-07-09 17:44:50,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658502531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:50,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810993804] [2021-07-09 17:44:50,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:50,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:44:50,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:50,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:50,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:50,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810993804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:50,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:50,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:44:50,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087120145] [2021-07-09 17:44:50,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:44:50,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:50,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:44:50,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:44:50,753 INFO L87 Difference]: Start difference. First operand 1716 states and 5971 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:51,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:51,122 INFO L93 Difference]: Finished difference Result 2181 states and 7378 transitions. [2021-07-09 17:44:51,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:44:51,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:51,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:51,127 INFO L225 Difference]: With dead ends: 2181 [2021-07-09 17:44:51,127 INFO L226 Difference]: Without dead ends: 2121 [2021-07-09 17:44:51,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:44:51,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2021-07-09 17:44:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1750. [2021-07-09 17:44:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 3.509433962264151) internal successors, (6138), 1749 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:51,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 6138 transitions. [2021-07-09 17:44:51,151 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 6138 transitions. Word has length 24 [2021-07-09 17:44:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:51,151 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 6138 transitions. [2021-07-09 17:44:51,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 6138 transitions. [2021-07-09 17:44:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:51,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:51,153 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:51,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6481,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:51,365 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:51,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:51,365 INFO L82 PathProgramCache]: Analyzing trace with hash 923090792, now seen corresponding path program 292 times [2021-07-09 17:44:51,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:51,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641341267] [2021-07-09 17:44:51,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:51,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:51,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641341267] [2021-07-09 17:44:51,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641341267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:51,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201366217] [2021-07-09 17:44:51,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:51,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:44:51,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:51,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:51,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201366217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:51,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:51,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:44:51,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334931309] [2021-07-09 17:44:51,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:44:51,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:51,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:44:51,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:44:51,726 INFO L87 Difference]: Start difference. First operand 1750 states and 6138 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:52,102 INFO L93 Difference]: Finished difference Result 2037 states and 6922 transitions. [2021-07-09 17:44:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:44:52,103 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:52,106 INFO L225 Difference]: With dead ends: 2037 [2021-07-09 17:44:52,106 INFO L226 Difference]: Without dead ends: 1968 [2021-07-09 17:44:52,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 338.7ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:44:52,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-07-09 17:44:52,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1662. [2021-07-09 17:44:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.4659843467790488) internal successors, (5757), 1661 states have internal predecessors, (5757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5757 transitions. [2021-07-09 17:44:52,126 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5757 transitions. Word has length 24 [2021-07-09 17:44:52,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:52,126 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5757 transitions. [2021-07-09 17:44:52,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:52,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5757 transitions. [2021-07-09 17:44:52,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:52,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:52,128 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:52,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6489,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:52,338 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:52,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:52,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1795856550, now seen corresponding path program 293 times [2021-07-09 17:44:52,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:52,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982512324] [2021-07-09 17:44:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:52,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:52,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982512324] [2021-07-09 17:44:52,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982512324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:52,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754178225] [2021-07-09 17:44:52,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:52,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:44:52,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:52,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:52,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:52,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:52,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:52,602 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-07-09 17:44:52,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:52,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-07-09 17:44:52,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:52,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:52,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:52,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:52,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:52,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:52,685 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:44:52,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:52,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:52,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:52,690 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:52,714 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:44:52,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:52,715 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:44:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:52,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754178225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:52,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:52,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-07-09 17:44:52,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695806375] [2021-07-09 17:44:52,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:44:52,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:52,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:44:52,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:44:52,760 INFO L87 Difference]: Start difference. First operand 1662 states and 5757 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:53,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:53,193 INFO L93 Difference]: Finished difference Result 1959 states and 6670 transitions. [2021-07-09 17:44:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:44:53,193 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:53,196 INFO L225 Difference]: With dead ends: 1959 [2021-07-09 17:44:53,196 INFO L226 Difference]: Without dead ends: 1890 [2021-07-09 17:44:53,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:44:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-07-09 17:44:53,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1713. [2021-07-09 17:44:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1712 states have (on average 3.4696261682242993) internal successors, (5940), 1712 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:53,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 5940 transitions. [2021-07-09 17:44:53,216 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 5940 transitions. Word has length 24 [2021-07-09 17:44:53,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:53,216 INFO L482 AbstractCegarLoop]: Abstraction has 1713 states and 5940 transitions. [2021-07-09 17:44:53,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:53,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 5940 transitions. [2021-07-09 17:44:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:53,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:53,218 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:53,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6500,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:53,434 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:53,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:53,434 INFO L82 PathProgramCache]: Analyzing trace with hash -620365906, now seen corresponding path program 294 times [2021-07-09 17:44:53,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:53,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719681483] [2021-07-09 17:44:53,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:53,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:53,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719681483] [2021-07-09 17:44:53,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719681483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:53,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68383031] [2021-07-09 17:44:53,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:53,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:44:53,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:53,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:53,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:53,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:53,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:53,703 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-07-09 17:44:53,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:53,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-07-09 17:44:53,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:53,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:53,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:53,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:53,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:53,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:53,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:53,863 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:53,866 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:53,866 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:53,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:53,870 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:53,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:53,872 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:53,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:53,875 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:53,945 INFO L628 ElimStorePlain]: treesize reduction 43, result has 65.9 percent of original size [2021-07-09 17:44:53,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:53,949 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:53,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:53,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:53,989 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:53,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:53,992 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:54,054 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.9 percent of original size [2021-07-09 17:44:54,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:54,057 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:54,100 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.8 percent of original size [2021-07-09 17:44:54,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:44:54,102 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-07-09 17:44:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:54,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68383031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:54,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:54,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:44:54,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14837433] [2021-07-09 17:44:54,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:44:54,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:54,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:44:54,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:44:54,182 INFO L87 Difference]: Start difference. First operand 1713 states and 5940 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:54,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:54,584 INFO L93 Difference]: Finished difference Result 2126 states and 7197 transitions. [2021-07-09 17:44:54,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:44:54,585 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:54,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:54,588 INFO L225 Difference]: With dead ends: 2126 [2021-07-09 17:44:54,588 INFO L226 Difference]: Without dead ends: 2066 [2021-07-09 17:44:54,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 364.0ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:44:54,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-07-09 17:44:54,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1747. [2021-07-09 17:44:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 3.497709049255441) internal successors, (6107), 1746 states have internal predecessors, (6107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 6107 transitions. [2021-07-09 17:44:54,610 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 6107 transitions. Word has length 24 [2021-07-09 17:44:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:54,610 INFO L482 AbstractCegarLoop]: Abstraction has 1747 states and 6107 transitions. [2021-07-09 17:44:54,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:54,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 6107 transitions. [2021-07-09 17:44:54,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:54,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:54,612 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:54,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6508 [2021-07-09 17:44:54,828 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:54,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:54,829 INFO L82 PathProgramCache]: Analyzing trace with hash 993200828, now seen corresponding path program 295 times [2021-07-09 17:44:54,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:54,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497812578] [2021-07-09 17:44:54,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:54,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:54,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497812578] [2021-07-09 17:44:54,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497812578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:54,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290975048] [2021-07-09 17:44:54,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:55,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:55,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:55,061 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:55,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:55,081 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-07-09 17:44:55,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:55,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:55,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:55,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:44:55,093 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-07-09 17:44:55,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:55,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:55,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:55,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:55,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:44:55,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:55,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:55,223 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:55,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:55,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:55,290 INFO L628 ElimStorePlain]: treesize reduction 43, result has 59.0 percent of original size [2021-07-09 17:44:55,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:55,293 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:55,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:55,296 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:55,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:55,299 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:55,337 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-07-09 17:44:55,337 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-07-09 17:44:55,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:44:55,338 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:146, output treesize:34 [2021-07-09 17:44:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:55,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290975048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:55,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:55,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:44:55,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520139974] [2021-07-09 17:44:55,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:44:55,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:55,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:44:55,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:44:55,415 INFO L87 Difference]: Start difference. First operand 1747 states and 6107 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:55,814 INFO L93 Difference]: Finished difference Result 1982 states and 6741 transitions. [2021-07-09 17:44:55,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:44:55,815 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:55,818 INFO L225 Difference]: With dead ends: 1982 [2021-07-09 17:44:55,818 INFO L226 Difference]: Without dead ends: 1915 [2021-07-09 17:44:55,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 340.6ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:44:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-07-09 17:44:55,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1683. [2021-07-09 17:44:55,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.460166468489893) internal successors, (5820), 1682 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:55,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5820 transitions. [2021-07-09 17:44:55,838 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5820 transitions. Word has length 24 [2021-07-09 17:44:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:55,838 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5820 transitions. [2021-07-09 17:44:55,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5820 transitions. [2021-07-09 17:44:55,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:55,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:55,840 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:56,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6551 [2021-07-09 17:44:56,056 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:56,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:56,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1460105690, now seen corresponding path program 296 times [2021-07-09 17:44:56,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:56,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662894451] [2021-07-09 17:44:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:56,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:56,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662894451] [2021-07-09 17:44:56,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662894451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:56,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316679308] [2021-07-09 17:44:56,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:56,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:44:56,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:56,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:56,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:56,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:56,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:56,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:56,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:56,367 INFO L628 ElimStorePlain]: treesize reduction 26, result has 70.5 percent of original size [2021-07-09 17:44:56,367 INFO L518 ElimStorePlain]: Eliminatee v_prenex_244 vanished before elimination [2021-07-09 17:44:56,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:56,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:56,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:56,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:44:56,395 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:95, output treesize:58 [2021-07-09 17:44:56,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:56,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:56,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:56,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:56,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:56,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:56,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:56,478 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:56,544 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-07-09 17:44:56,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:56,548 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:56,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:56,551 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:56,606 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-07-09 17:44:56,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:56,607 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-07-09 17:44:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:56,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316679308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:56,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:56,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:44:56,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829039384] [2021-07-09 17:44:56,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:44:56,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:56,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:44:56,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:44:56,691 INFO L87 Difference]: Start difference. First operand 1683 states and 5820 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:57,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:57,092 INFO L93 Difference]: Finished difference Result 2009 states and 6829 transitions. [2021-07-09 17:44:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:44:57,092 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:57,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:57,095 INFO L225 Difference]: With dead ends: 2009 [2021-07-09 17:44:57,095 INFO L226 Difference]: Without dead ends: 1949 [2021-07-09 17:44:57,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 391.6ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:44:57,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2021-07-09 17:44:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1736. [2021-07-09 17:44:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 3.4933717579250723) internal successors, (6061), 1735 states have internal predecessors, (6061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:57,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 6061 transitions. [2021-07-09 17:44:57,151 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 6061 transitions. Word has length 24 [2021-07-09 17:44:57,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:57,151 INFO L482 AbstractCegarLoop]: Abstraction has 1736 states and 6061 transitions. [2021-07-09 17:44:57,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:57,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 6061 transitions. [2021-07-09 17:44:57,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:57,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:57,153 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:57,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6593 [2021-07-09 17:44:57,370 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:57,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:57,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1221294872, now seen corresponding path program 297 times [2021-07-09 17:44:57,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:57,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995114857] [2021-07-09 17:44:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:57,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:57,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995114857] [2021-07-09 17:44:57,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995114857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:57,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988714825] [2021-07-09 17:44:57,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:57,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:44:57,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:57,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:57,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:57,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:57,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:57,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:57,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:57,688 INFO L628 ElimStorePlain]: treesize reduction 26, result has 70.5 percent of original size [2021-07-09 17:44:57,688 INFO L518 ElimStorePlain]: Eliminatee v_prenex_246 vanished before elimination [2021-07-09 17:44:57,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:57,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:57,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:44:57,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:44:57,715 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:95, output treesize:58 [2021-07-09 17:44:57,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:57,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:57,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:57,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:57,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:57,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:57,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:44:57,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:57,860 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-07-09 17:44:57,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:57,863 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:57,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:44:57,866 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:44:57,921 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-07-09 17:44:57,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:44:57,922 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-07-09 17:44:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:58,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988714825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:58,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:58,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:44:58,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46289537] [2021-07-09 17:44:58,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:44:58,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:58,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:44:58,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:44:58,006 INFO L87 Difference]: Start difference. First operand 1736 states and 6061 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:58,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:44:58,496 INFO L93 Difference]: Finished difference Result 2012 states and 6773 transitions. [2021-07-09 17:44:58,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:44:58,496 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:44:58,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:44:58,500 INFO L225 Difference]: With dead ends: 2012 [2021-07-09 17:44:58,500 INFO L226 Difference]: Without dead ends: 1947 [2021-07-09 17:44:58,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 473.3ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:44:58,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-07-09 17:44:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1705. [2021-07-09 17:44:58,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.466549295774648) internal successors, (5907), 1704 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:58,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5907 transitions. [2021-07-09 17:44:58,521 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5907 transitions. Word has length 24 [2021-07-09 17:44:58,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:44:58,521 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5907 transitions. [2021-07-09 17:44:58,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:44:58,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5907 transitions. [2021-07-09 17:44:58,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:44:58,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:44:58,523 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:44:58,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6612,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:58,739 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:44:58,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:44:58,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1554633626, now seen corresponding path program 298 times [2021-07-09 17:44:58,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:44:58,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837501866] [2021-07-09 17:44:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:44:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:44:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:44:58,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:44:58,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837501866] [2021-07-09 17:44:58,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837501866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:58,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574397487] [2021-07-09 17:44:58,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:44:58,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:44:58,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:44:58,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:44:58,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:44:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:44:59,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574397487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:44:59,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:44:59,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-09 17:44:59,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463056857] [2021-07-09 17:44:59,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:44:59,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:44:59,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:44:59,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:44:59,200 INFO L87 Difference]: Start difference. First operand 1705 states and 5907 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:00,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:00,052 INFO L93 Difference]: Finished difference Result 1993 states and 6667 transitions. [2021-07-09 17:45:00,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:45:00,052 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:00,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:00,055 INFO L225 Difference]: With dead ends: 1993 [2021-07-09 17:45:00,055 INFO L226 Difference]: Without dead ends: 1894 [2021-07-09 17:45:00,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 650.9ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:45:00,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-07-09 17:45:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1654. [2021-07-09 17:45:00,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.468844525105868) internal successors, (5734), 1653 states have internal predecessors, (5734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5734 transitions. [2021-07-09 17:45:00,076 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5734 transitions. Word has length 24 [2021-07-09 17:45:00,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:00,076 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5734 transitions. [2021-07-09 17:45:00,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:00,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5734 transitions. [2021-07-09 17:45:00,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:00,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:00,078 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:00,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6631 [2021-07-09 17:45:00,294 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:00,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:00,295 INFO L82 PathProgramCache]: Analyzing trace with hash 377554566, now seen corresponding path program 299 times [2021-07-09 17:45:00,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:00,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612125367] [2021-07-09 17:45:00,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:00,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:00,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612125367] [2021-07-09 17:45:00,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612125367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:00,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116859176] [2021-07-09 17:45:00,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:00,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:45:00,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:00,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:00,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:00,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:00,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:00,536 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-07-09 17:45:00,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:00,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:00,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:00,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:45:00,547 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-07-09 17:45:00,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:00,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:00,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:00,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:00,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:00,596 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:00,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:00,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:00,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:00,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:00,617 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:00,642 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:45:00,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:45:00,643 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:45:00,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:00,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116859176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:00,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:00,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-07-09 17:45:00,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813650582] [2021-07-09 17:45:00,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:45:00,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:00,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:45:00,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:45:00,686 INFO L87 Difference]: Start difference. First operand 1654 states and 5734 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:01,158 INFO L93 Difference]: Finished difference Result 1946 states and 6629 transitions. [2021-07-09 17:45:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:45:01,158 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:01,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:01,161 INFO L225 Difference]: With dead ends: 1946 [2021-07-09 17:45:01,161 INFO L226 Difference]: Without dead ends: 1877 [2021-07-09 17:45:01,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:45:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-07-09 17:45:01,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1700. [2021-07-09 17:45:01,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 3.472042377869335) internal successors, (5899), 1699 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:01,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 5899 transitions. [2021-07-09 17:45:01,181 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 5899 transitions. Word has length 24 [2021-07-09 17:45:01,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:01,181 INFO L482 AbstractCegarLoop]: Abstraction has 1700 states and 5899 transitions. [2021-07-09 17:45:01,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:01,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 5899 transitions. [2021-07-09 17:45:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:01,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:01,184 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:01,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6650,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:01,400 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:01,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1553045210, now seen corresponding path program 300 times [2021-07-09 17:45:01,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:01,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062198795] [2021-07-09 17:45:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:01,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:01,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062198795] [2021-07-09 17:45:01,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062198795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:01,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062889203] [2021-07-09 17:45:01,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:01,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:45:01,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:01,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:01,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:01,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:01,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:01,657 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-07-09 17:45:01,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:45:01,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-07-09 17:45:01,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:01,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:01,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:01,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:01,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:01,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:01,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:01,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:01,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:01,748 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:01,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:01,751 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:01,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:01,754 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:01,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:01,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:01,798 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:01,870 INFO L628 ElimStorePlain]: treesize reduction 20, result has 80.0 percent of original size [2021-07-09 17:45:01,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:01,874 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:01,939 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.1 percent of original size [2021-07-09 17:45:01,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:01,943 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:01,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:01,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:01,976 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:02,020 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.8 percent of original size [2021-07-09 17:45:02,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:02,021 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:169, output treesize:34 [2021-07-09 17:45:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:02,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062889203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:02,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:02,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:45:02,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420006190] [2021-07-09 17:45:02,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:45:02,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:02,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:45:02,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:45:02,100 INFO L87 Difference]: Start difference. First operand 1700 states and 5899 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:02,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:02,605 INFO L93 Difference]: Finished difference Result 2113 states and 7156 transitions. [2021-07-09 17:45:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:45:02,606 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:02,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:02,609 INFO L225 Difference]: With dead ends: 2113 [2021-07-09 17:45:02,609 INFO L226 Difference]: Without dead ends: 2053 [2021-07-09 17:45:02,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 404.7ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:45:02,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-07-09 17:45:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1734. [2021-07-09 17:45:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.500288517022504) internal successors, (6066), 1733 states have internal predecessors, (6066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:02,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 6066 transitions. [2021-07-09 17:45:02,631 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 6066 transitions. Word has length 24 [2021-07-09 17:45:02,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:02,631 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 6066 transitions. [2021-07-09 17:45:02,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:02,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 6066 transitions. [2021-07-09 17:45:02,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:02,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:02,634 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:02,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6657,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:02,850 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:02,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:02,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1128355352, now seen corresponding path program 301 times [2021-07-09 17:45:02,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:02,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844371882] [2021-07-09 17:45:02,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:03,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:03,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844371882] [2021-07-09 17:45:03,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844371882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:03,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631275061] [2021-07-09 17:45:03,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:03,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:03,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:03,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:03,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:03,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:03,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:45:03,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2021-07-09 17:45:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:03,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631275061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:03,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:03,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-09 17:45:03,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547373211] [2021-07-09 17:45:03,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:45:03,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:03,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:45:03,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:45:03,463 INFO L87 Difference]: Start difference. First operand 1734 states and 6066 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:05,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:05,194 INFO L93 Difference]: Finished difference Result 2180 states and 7268 transitions. [2021-07-09 17:45:05,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:45:05,195 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:05,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:05,198 INFO L225 Difference]: With dead ends: 2180 [2021-07-09 17:45:05,198 INFO L226 Difference]: Without dead ends: 2099 [2021-07-09 17:45:05,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1331.5ms TimeCoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:45:05,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-07-09 17:45:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 1670. [2021-07-09 17:45:05,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4625524266027563) internal successors, (5779), 1669 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5779 transitions. [2021-07-09 17:45:05,219 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5779 transitions. Word has length 24 [2021-07-09 17:45:05,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:05,219 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5779 transitions. [2021-07-09 17:45:05,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:05,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5779 transitions. [2021-07-09 17:45:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:05,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:05,221 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:05,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6672 [2021-07-09 17:45:05,437 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:05,437 INFO L82 PathProgramCache]: Analyzing trace with hash -661450490, now seen corresponding path program 302 times [2021-07-09 17:45:05,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:05,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338718018] [2021-07-09 17:45:05,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:05,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:05,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338718018] [2021-07-09 17:45:05,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338718018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:05,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218140258] [2021-07-09 17:45:05,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:05,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:45:05,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:05,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:05,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:05,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:05,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:05,780 INFO L628 ElimStorePlain]: treesize reduction 53, result has 62.4 percent of original size [2021-07-09 17:45:05,780 INFO L518 ElimStorePlain]: Eliminatee v_prenex_253 vanished before elimination [2021-07-09 17:45:05,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:05,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:05,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:05,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:05,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:05,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:05,826 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:05,881 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-07-09 17:45:05,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:05,881 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:144, output treesize:58 [2021-07-09 17:45:05,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:05,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:05,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:05,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:05,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:05,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:05,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:05,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:06,033 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-07-09 17:45:06,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:06,037 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:06,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:06,040 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:06,097 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-07-09 17:45:06,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:45:06,099 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-07-09 17:45:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:06,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218140258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:06,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:06,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:45:06,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977791125] [2021-07-09 17:45:06,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:45:06,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:06,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:45:06,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:45:06,186 INFO L87 Difference]: Start difference. First operand 1670 states and 5779 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:06,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:06,628 INFO L93 Difference]: Finished difference Result 1989 states and 6754 transitions. [2021-07-09 17:45:06,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:45:06,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:06,631 INFO L225 Difference]: With dead ends: 1989 [2021-07-09 17:45:06,631 INFO L226 Difference]: Without dead ends: 1929 [2021-07-09 17:45:06,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 427.7ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:45:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-07-09 17:45:06,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1716. [2021-07-09 17:45:06,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.4903790087463555) internal successors, (5986), 1715 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:06,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5986 transitions. [2021-07-09 17:45:06,652 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5986 transitions. Word has length 24 [2021-07-09 17:45:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:06,652 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 5986 transitions. [2021-07-09 17:45:06,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5986 transitions. [2021-07-09 17:45:06,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:06,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:06,654 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:06,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6710,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:06,870 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:06,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:06,871 INFO L82 PathProgramCache]: Analyzing trace with hash 952116244, now seen corresponding path program 303 times [2021-07-09 17:45:06,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:06,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880898774] [2021-07-09 17:45:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:07,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:07,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880898774] [2021-07-09 17:45:07,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880898774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:07,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294112855] [2021-07-09 17:45:07,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:07,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:45:07,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:07,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:07,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:07,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294112855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:07,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:07,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-09 17:45:07,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457564091] [2021-07-09 17:45:07,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:45:07,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:07,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:45:07,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:45:07,363 INFO L87 Difference]: Start difference. First operand 1716 states and 5986 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:08,884 INFO L93 Difference]: Finished difference Result 2227 states and 7324 transitions. [2021-07-09 17:45:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:45:08,884 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:08,888 INFO L225 Difference]: With dead ends: 2227 [2021-07-09 17:45:08,888 INFO L226 Difference]: Without dead ends: 2115 [2021-07-09 17:45:08,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1176.8ms TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:45:08,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-07-09 17:45:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1673. [2021-07-09 17:45:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.4671052631578947) internal successors, (5797), 1672 states have internal predecessors, (5797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5797 transitions. [2021-07-09 17:45:08,933 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5797 transitions. Word has length 24 [2021-07-09 17:45:08,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:08,933 INFO L482 AbstractCegarLoop]: Abstraction has 1673 states and 5797 transitions. [2021-07-09 17:45:08,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5797 transitions. [2021-07-09 17:45:08,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:08,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:08,935 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:09,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6726 [2021-07-09 17:45:09,151 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:09,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:09,152 INFO L82 PathProgramCache]: Analyzing trace with hash -591340454, now seen corresponding path program 304 times [2021-07-09 17:45:09,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:09,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856451688] [2021-07-09 17:45:09,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:09,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:09,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856451688] [2021-07-09 17:45:09,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856451688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:09,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216316147] [2021-07-09 17:45:09,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:09,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:45:09,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:09,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:09,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:09,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216316147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:09,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:09,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-09 17:45:09,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500281776] [2021-07-09 17:45:09,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:45:09,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:09,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:45:09,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:45:09,615 INFO L87 Difference]: Start difference. First operand 1673 states and 5797 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:11,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:11,838 INFO L93 Difference]: Finished difference Result 2322 states and 7662 transitions. [2021-07-09 17:45:11,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 17:45:11,838 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:11,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:11,842 INFO L225 Difference]: With dead ends: 2322 [2021-07-09 17:45:11,842 INFO L226 Difference]: Without dead ends: 2172 [2021-07-09 17:45:11,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1826.6ms TimeCoverageRelationStatistics Valid=411, Invalid=3011, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 17:45:11,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-09 17:45:11,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1686. [2021-07-09 17:45:11,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.4949554896142434) internal successors, (5889), 1685 states have internal predecessors, (5889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5889 transitions. [2021-07-09 17:45:11,865 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5889 transitions. Word has length 24 [2021-07-09 17:45:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:11,865 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5889 transitions. [2021-07-09 17:45:11,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5889 transitions. [2021-07-09 17:45:11,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:11,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:11,867 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:12,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6751 [2021-07-09 17:45:12,083 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:12,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:12,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1349954870, now seen corresponding path program 305 times [2021-07-09 17:45:12,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:12,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823789139] [2021-07-09 17:45:12,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:12,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:12,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823789139] [2021-07-09 17:45:12,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823789139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:12,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854669664] [2021-07-09 17:45:12,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:12,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:45:12,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:12,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:12,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:12,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:45:12,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854669664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:12,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:12,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-07-09 17:45:12,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192512595] [2021-07-09 17:45:12,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:45:12,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:12,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:45:12,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:45:12,585 INFO L87 Difference]: Start difference. First operand 1686 states and 5889 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:14,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:14,521 INFO L93 Difference]: Finished difference Result 2053 states and 6839 transitions. [2021-07-09 17:45:14,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:45:14,521 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:14,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:14,525 INFO L225 Difference]: With dead ends: 2053 [2021-07-09 17:45:14,525 INFO L226 Difference]: Without dead ends: 1920 [2021-07-09 17:45:14,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1574.7ms TimeCoverageRelationStatistics Valid=399, Invalid=2793, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:45:14,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-07-09 17:45:14,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1672. [2021-07-09 17:45:14,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.485338120885697) internal successors, (5824), 1671 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:14,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5824 transitions. [2021-07-09 17:45:14,546 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5824 transitions. Word has length 24 [2021-07-09 17:45:14,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:14,546 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 5824 transitions. [2021-07-09 17:45:14,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:14,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5824 transitions. [2021-07-09 17:45:14,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:14,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:14,548 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:14,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6769 [2021-07-09 17:45:14,756 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:14,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:14,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1601280286, now seen corresponding path program 306 times [2021-07-09 17:45:14,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:14,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872716376] [2021-07-09 17:45:14,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:14,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:14,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872716376] [2021-07-09 17:45:14,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872716376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:14,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642836780] [2021-07-09 17:45:14,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:14,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:45:14,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:14,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:14,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:15,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:45:15,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,092 INFO L628 ElimStorePlain]: treesize reduction 63, result has 61.3 percent of original size [2021-07-09 17:45:15,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:45:15,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,144 INFO L628 ElimStorePlain]: treesize reduction 21, result has 77.7 percent of original size [2021-07-09 17:45:15,144 INFO L518 ElimStorePlain]: Eliminatee v_prenex_257 vanished before elimination [2021-07-09 17:45:15,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:45:15,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:45:15,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:15,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:15,170 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:168, output treesize:62 [2021-07-09 17:45:15,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:15,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:15,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:15,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:15,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:15,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:15,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:15,313 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-07-09 17:45:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:45:15,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642836780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:15,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:15,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:45:15,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947503889] [2021-07-09 17:45:15,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:45:15,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:15,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:45:15,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:45:15,335 INFO L87 Difference]: Start difference. First operand 1672 states and 5824 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:15,962 INFO L93 Difference]: Finished difference Result 1974 states and 6688 transitions. [2021-07-09 17:45:15,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:45:15,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:15,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:15,965 INFO L225 Difference]: With dead ends: 1974 [2021-07-09 17:45:15,965 INFO L226 Difference]: Without dead ends: 1899 [2021-07-09 17:45:15,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 516.5ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:45:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-07-09 17:45:15,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1672. [2021-07-09 17:45:15,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.473967684021544) internal successors, (5805), 1671 states have internal predecessors, (5805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:15,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5805 transitions. [2021-07-09 17:45:15,985 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5805 transitions. Word has length 24 [2021-07-09 17:45:15,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:15,985 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 5805 transitions. [2021-07-09 17:45:15,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:15,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5805 transitions. [2021-07-09 17:45:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:15,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:15,987 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:16,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6785 [2021-07-09 17:45:16,201 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:16,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:16,201 INFO L82 PathProgramCache]: Analyzing trace with hash -308120276, now seen corresponding path program 307 times [2021-07-09 17:45:16,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:16,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108840136] [2021-07-09 17:45:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:16,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:16,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108840136] [2021-07-09 17:45:16,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108840136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:16,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613122573] [2021-07-09 17:45:16,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:16,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:16,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:16,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:45:16,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:16,526 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.3 percent of original size [2021-07-09 17:45:16,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:45:16,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:16,589 INFO L628 ElimStorePlain]: treesize reduction 21, result has 77.7 percent of original size [2021-07-09 17:45:16,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:45:16,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:16,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:16,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:45:16,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:16,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:16,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:16,652 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:111, output treesize:62 [2021-07-09 17:45:16,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:16,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:16,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:16,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:16,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:16,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:16,788 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:16,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:16,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:16,802 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-07-09 17:45:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:45:16,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613122573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:16,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:16,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:45:16,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474556090] [2021-07-09 17:45:16,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:45:16,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:16,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:45:16,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:45:16,825 INFO L87 Difference]: Start difference. First operand 1672 states and 5805 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:17,651 INFO L93 Difference]: Finished difference Result 1887 states and 6401 transitions. [2021-07-09 17:45:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:45:17,652 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:17,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:17,655 INFO L225 Difference]: With dead ends: 1887 [2021-07-09 17:45:17,655 INFO L226 Difference]: Without dead ends: 1794 [2021-07-09 17:45:17,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 711.9ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:45:17,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2021-07-09 17:45:17,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1670. [2021-07-09 17:45:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4661473936488916) internal successors, (5785), 1669 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5785 transitions. [2021-07-09 17:45:17,674 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5785 transitions. Word has length 24 [2021-07-09 17:45:17,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:17,674 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5785 transitions. [2021-07-09 17:45:17,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:17,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5785 transitions. [2021-07-09 17:45:17,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:17,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:17,677 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:17,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6799,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:17,893 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:17,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1902468142, now seen corresponding path program 308 times [2021-07-09 17:45:17,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:17,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640357434] [2021-07-09 17:45:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:18,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:18,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640357434] [2021-07-09 17:45:18,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640357434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:18,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372193187] [2021-07-09 17:45:18,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:18,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:45:18,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:18,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:45:18,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:45:18,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372193187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:18,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:18,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-09 17:45:18,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888222706] [2021-07-09 17:45:18,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:45:18,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:18,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:45:18,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:45:18,336 INFO L87 Difference]: Start difference. First operand 1670 states and 5785 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:20,184 INFO L93 Difference]: Finished difference Result 2329 states and 7648 transitions. [2021-07-09 17:45:20,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:45:20,184 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:20,188 INFO L225 Difference]: With dead ends: 2329 [2021-07-09 17:45:20,188 INFO L226 Difference]: Without dead ends: 2138 [2021-07-09 17:45:20,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1454.8ms TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:45:20,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-07-09 17:45:20,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1693. [2021-07-09 17:45:20,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1692 states have (on average 3.4680851063829787) internal successors, (5868), 1692 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 5868 transitions. [2021-07-09 17:45:20,210 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 5868 transitions. Word has length 24 [2021-07-09 17:45:20,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:20,210 INFO L482 AbstractCegarLoop]: Abstraction has 1693 states and 5868 transitions. [2021-07-09 17:45:20,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:20,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 5868 transitions. [2021-07-09 17:45:20,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:20,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:20,212 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:20,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6816 [2021-07-09 17:45:20,429 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:20,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1695049814, now seen corresponding path program 309 times [2021-07-09 17:45:20,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:20,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538146381] [2021-07-09 17:45:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:20,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:20,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538146381] [2021-07-09 17:45:20,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538146381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:20,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448635207] [2021-07-09 17:45:20,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:20,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:45:20,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:20,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:45:20,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:45:20,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448635207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:20,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:20,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-09 17:45:20,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426417360] [2021-07-09 17:45:20,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:45:20,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:20,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:45:20,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:45:20,910 INFO L87 Difference]: Start difference. First operand 1693 states and 5868 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:23,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:23,858 INFO L93 Difference]: Finished difference Result 2838 states and 9112 transitions. [2021-07-09 17:45:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 17:45:23,858 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:23,863 INFO L225 Difference]: With dead ends: 2838 [2021-07-09 17:45:23,863 INFO L226 Difference]: Without dead ends: 2628 [2021-07-09 17:45:23,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 2446.8ms TimeCoverageRelationStatistics Valid=471, Invalid=3435, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 17:45:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-07-09 17:45:23,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 1719. [2021-07-09 17:45:23,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 3.470896391152503) internal successors, (5963), 1718 states have internal predecessors, (5963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5963 transitions. [2021-07-09 17:45:23,888 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5963 transitions. Word has length 24 [2021-07-09 17:45:23,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:23,888 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 5963 transitions. [2021-07-09 17:45:23,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5963 transitions. [2021-07-09 17:45:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:23,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:23,891 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:24,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6822,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:24,097 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:24,097 INFO L82 PathProgramCache]: Analyzing trace with hash 887134254, now seen corresponding path program 310 times [2021-07-09 17:45:24,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:24,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853286260] [2021-07-09 17:45:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:24,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:24,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853286260] [2021-07-09 17:45:24,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853286260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:24,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75282453] [2021-07-09 17:45:24,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:24,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:45:24,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:24,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:45:24,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:45:24,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75282453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:24,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:24,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-07-09 17:45:24,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9361378] [2021-07-09 17:45:24,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:45:24,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:24,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:45:24,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:45:24,537 INFO L87 Difference]: Start difference. First operand 1719 states and 5963 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:26,356 INFO L93 Difference]: Finished difference Result 2452 states and 8102 transitions. [2021-07-09 17:45:26,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 17:45:26,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:26,360 INFO L225 Difference]: With dead ends: 2452 [2021-07-09 17:45:26,360 INFO L226 Difference]: Without dead ends: 2337 [2021-07-09 17:45:26,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1399.9ms TimeCoverageRelationStatistics Valid=336, Invalid=2420, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:45:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-07-09 17:45:26,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1751. [2021-07-09 17:45:26,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 3.4977142857142858) internal successors, (6121), 1750 states have internal predecessors, (6121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 6121 transitions. [2021-07-09 17:45:26,386 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 6121 transitions. Word has length 24 [2021-07-09 17:45:26,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:26,386 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 6121 transitions. [2021-07-09 17:45:26,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 6121 transitions. [2021-07-09 17:45:26,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:26,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:26,388 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:26,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6830,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:26,605 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:26,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:26,605 INFO L82 PathProgramCache]: Analyzing trace with hash -660978942, now seen corresponding path program 311 times [2021-07-09 17:45:26,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:26,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128821375] [2021-07-09 17:45:26,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:45:26,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:26,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128821375] [2021-07-09 17:45:26,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128821375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:26,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509961598] [2021-07-09 17:45:26,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:26,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:45:26,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:26,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:45:26,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:27,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509961598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:27,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:27,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-07-09 17:45:27,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359238028] [2021-07-09 17:45:27,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:45:27,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:27,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:45:27,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:45:27,081 INFO L87 Difference]: Start difference. First operand 1751 states and 6121 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:29,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:29,021 INFO L93 Difference]: Finished difference Result 2641 states and 8576 transitions. [2021-07-09 17:45:29,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:45:29,021 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:29,025 INFO L225 Difference]: With dead ends: 2641 [2021-07-09 17:45:29,025 INFO L226 Difference]: Without dead ends: 2503 [2021-07-09 17:45:29,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1529.0ms TimeCoverageRelationStatistics Valid=406, Invalid=3134, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:45:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2021-07-09 17:45:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1670. [2021-07-09 17:45:29,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4661473936488916) internal successors, (5785), 1669 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5785 transitions. [2021-07-09 17:45:29,050 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5785 transitions. Word has length 24 [2021-07-09 17:45:29,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:29,050 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5785 transitions. [2021-07-09 17:45:29,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:29,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5785 transitions. [2021-07-09 17:45:29,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:29,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:29,052 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:29,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6838,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:29,268 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:29,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:29,268 INFO L82 PathProgramCache]: Analyzing trace with hash 848323318, now seen corresponding path program 312 times [2021-07-09 17:45:29,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:29,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658125585] [2021-07-09 17:45:29,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:29,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:29,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658125585] [2021-07-09 17:45:29,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658125585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:29,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029705809] [2021-07-09 17:45:29,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:29,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:45:29,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:29,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:45:29,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:45:29,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029705809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:29,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:29,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 17:45:29,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174116414] [2021-07-09 17:45:29,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:45:29,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:29,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:45:29,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:45:29,667 INFO L87 Difference]: Start difference. First operand 1670 states and 5785 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:31,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:31,942 INFO L93 Difference]: Finished difference Result 2977 states and 9542 transitions. [2021-07-09 17:45:31,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 17:45:31,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:31,947 INFO L225 Difference]: With dead ends: 2977 [2021-07-09 17:45:31,947 INFO L226 Difference]: Without dead ends: 2740 [2021-07-09 17:45:31,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1835.7ms TimeCoverageRelationStatistics Valid=367, Invalid=2939, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 17:45:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-07-09 17:45:31,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1677. [2021-07-09 17:45:31,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 3.4665871121718377) internal successors, (5810), 1676 states have internal predecessors, (5810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:31,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5810 transitions. [2021-07-09 17:45:31,973 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5810 transitions. Word has length 24 [2021-07-09 17:45:31,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:31,974 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5810 transitions. [2021-07-09 17:45:31,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:31,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5810 transitions. [2021-07-09 17:45:31,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:31,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:31,976 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:32,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6846 [2021-07-09 17:45:32,192 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:32,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:32,192 INFO L82 PathProgramCache]: Analyzing trace with hash -864459910, now seen corresponding path program 313 times [2021-07-09 17:45:32,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:32,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968558877] [2021-07-09 17:45:32,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:32,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:32,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968558877] [2021-07-09 17:45:32,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968558877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:32,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202777240] [2021-07-09 17:45:32,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:32,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:45:32,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:45:32,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202777240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:32,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:32,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 17:45:32,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183072716] [2021-07-09 17:45:32,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:45:32,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:32,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:45:32,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:45:32,555 INFO L87 Difference]: Start difference. First operand 1677 states and 5810 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:34,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:34,008 INFO L93 Difference]: Finished difference Result 2771 states and 9108 transitions. [2021-07-09 17:45:34,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:45:34,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:34,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:34,013 INFO L225 Difference]: With dead ends: 2771 [2021-07-09 17:45:34,013 INFO L226 Difference]: Without dead ends: 2606 [2021-07-09 17:45:34,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 993.6ms TimeCoverageRelationStatistics Valid=305, Invalid=2347, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 17:45:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-07-09 17:45:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1683. [2021-07-09 17:45:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.4863258026159336) internal successors, (5864), 1682 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:34,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5864 transitions. [2021-07-09 17:45:34,040 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5864 transitions. Word has length 24 [2021-07-09 17:45:34,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:34,040 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5864 transitions. [2021-07-09 17:45:34,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:34,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5864 transitions. [2021-07-09 17:45:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:34,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:34,043 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:34,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6854,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:34,259 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:34,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:34,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1186831674, now seen corresponding path program 314 times [2021-07-09 17:45:34,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:34,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993187238] [2021-07-09 17:45:34,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:34,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:34,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993187238] [2021-07-09 17:45:34,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993187238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:34,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308229954] [2021-07-09 17:45:34,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:34,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:45:34,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:34,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:34,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:34,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308229954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:34,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:34,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:45:34,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222740177] [2021-07-09 17:45:34,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:45:34,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:34,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:45:34,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:45:34,680 INFO L87 Difference]: Start difference. First operand 1683 states and 5864 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:34,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:34,898 INFO L93 Difference]: Finished difference Result 1907 states and 6473 transitions. [2021-07-09 17:45:34,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:45:34,899 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:34,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:34,902 INFO L225 Difference]: With dead ends: 1907 [2021-07-09 17:45:34,902 INFO L226 Difference]: Without dead ends: 1832 [2021-07-09 17:45:34,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:45:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-07-09 17:45:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1627. [2021-07-09 17:45:34,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 3.458179581795818) internal successors, (5623), 1626 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 5623 transitions. [2021-07-09 17:45:34,921 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 5623 transitions. Word has length 24 [2021-07-09 17:45:34,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:34,921 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 5623 transitions. [2021-07-09 17:45:34,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:34,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 5623 transitions. [2021-07-09 17:45:34,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:34,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:34,923 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:35,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6862 [2021-07-09 17:45:35,140 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:35,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:35,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1721159154, now seen corresponding path program 315 times [2021-07-09 17:45:35,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:35,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371451285] [2021-07-09 17:45:35,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:35,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:35,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371451285] [2021-07-09 17:45:35,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371451285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:35,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772146875] [2021-07-09 17:45:35,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:35,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:45:35,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:35,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:35,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:35,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772146875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:35,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:35,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-07-09 17:45:35,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847177666] [2021-07-09 17:45:35,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:45:35,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:35,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:45:35,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:45:35,584 INFO L87 Difference]: Start difference. First operand 1627 states and 5623 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:38,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:38,718 INFO L93 Difference]: Finished difference Result 2439 states and 7890 transitions. [2021-07-09 17:45:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 17:45:38,718 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:38,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:38,722 INFO L225 Difference]: With dead ends: 2439 [2021-07-09 17:45:38,722 INFO L226 Difference]: Without dead ends: 2225 [2021-07-09 17:45:38,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 2721.9ms TimeCoverageRelationStatistics Valid=715, Invalid=4115, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 17:45:38,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-07-09 17:45:38,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1621. [2021-07-09 17:45:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.45) internal successors, (5589), 1620 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:38,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5589 transitions. [2021-07-09 17:45:38,745 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5589 transitions. Word has length 24 [2021-07-09 17:45:38,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:38,746 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5589 transitions. [2021-07-09 17:45:38,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:38,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5589 transitions. [2021-07-09 17:45:38,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:38,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:38,748 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:38,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6887,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:38,964 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:38,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:38,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1073438964, now seen corresponding path program 316 times [2021-07-09 17:45:38,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:38,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55483434] [2021-07-09 17:45:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:39,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:39,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55483434] [2021-07-09 17:45:39,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55483434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:39,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831746740] [2021-07-09 17:45:39,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:39,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:45:39,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:39,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:39,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:39,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:39,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:39,235 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-07-09 17:45:39,235 INFO L518 ElimStorePlain]: Eliminatee v_prenex_261 vanished before elimination [2021-07-09 17:45:39,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:45:39,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-07-09 17:45:39,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:39,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:39,287 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:39,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:39,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:39,291 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:39,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:39,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:39,310 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:39,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:39,312 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:39,337 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:45:39,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:45:39,338 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:45:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:39,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831746740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:39,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:39,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-07-09 17:45:39,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972485237] [2021-07-09 17:45:39,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:45:39,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:39,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:45:39,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:45:39,381 INFO L87 Difference]: Start difference. First operand 1621 states and 5589 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:39,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:39,982 INFO L93 Difference]: Finished difference Result 1957 states and 6615 transitions. [2021-07-09 17:45:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:45:39,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:39,986 INFO L225 Difference]: With dead ends: 1957 [2021-07-09 17:45:39,986 INFO L226 Difference]: Without dead ends: 1888 [2021-07-09 17:45:39,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 405.5ms TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:45:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-07-09 17:45:40,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1651. [2021-07-09 17:45:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.4593939393939395) internal successors, (5708), 1650 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5708 transitions. [2021-07-09 17:45:40,006 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5708 transitions. Word has length 24 [2021-07-09 17:45:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:40,006 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5708 transitions. [2021-07-09 17:45:40,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:40,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5708 transitions. [2021-07-09 17:45:40,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:40,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:40,008 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:40,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6899,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:40,224 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:40,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:40,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2046037688, now seen corresponding path program 317 times [2021-07-09 17:45:40,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:40,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534376154] [2021-07-09 17:45:40,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:40,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:40,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534376154] [2021-07-09 17:45:40,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534376154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:40,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301384035] [2021-07-09 17:45:40,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:40,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:45:40,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:40,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:40,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:40,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:40,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:40,470 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-07-09 17:45:40,470 INFO L518 ElimStorePlain]: Eliminatee v_prenex_262 vanished before elimination [2021-07-09 17:45:40,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:45:40,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-07-09 17:45:40,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:40,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:40,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:40,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:40,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:40,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:40,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:40,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:40,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:40,591 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:40,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:40,594 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:40,669 INFO L628 ElimStorePlain]: treesize reduction 43, result has 67.4 percent of original size [2021-07-09 17:45:40,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:40,673 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:40,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:40,676 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:40,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:40,680 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:40,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:40,683 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:40,748 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.3 percent of original size [2021-07-09 17:45:40,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:40,751 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:40,797 INFO L628 ElimStorePlain]: treesize reduction 19, result has 72.5 percent of original size [2021-07-09 17:45:40,797 INFO L518 ElimStorePlain]: Eliminatee v_prenex_263 vanished before elimination [2021-07-09 17:45:40,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:40,798 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-07-09 17:45:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:40,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301384035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:40,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:40,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:45:40,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205851076] [2021-07-09 17:45:40,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:45:40,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:40,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:45:40,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:45:40,906 INFO L87 Difference]: Start difference. First operand 1651 states and 5708 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:41,617 INFO L93 Difference]: Finished difference Result 2130 states and 7161 transitions. [2021-07-09 17:45:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:45:41,617 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:41,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:41,621 INFO L225 Difference]: With dead ends: 2130 [2021-07-09 17:45:41,621 INFO L226 Difference]: Without dead ends: 2070 [2021-07-09 17:45:41,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 482.2ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:45:41,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-07-09 17:45:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1684. [2021-07-09 17:45:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.4878193701723115) internal successors, (5870), 1683 states have internal predecessors, (5870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5870 transitions. [2021-07-09 17:45:41,642 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5870 transitions. Word has length 24 [2021-07-09 17:45:41,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:41,642 INFO L482 AbstractCegarLoop]: Abstraction has 1684 states and 5870 transitions. [2021-07-09 17:45:41,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:41,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5870 transitions. [2021-07-09 17:45:41,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:41,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:41,645 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:41,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6906 [2021-07-09 17:45:41,858 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:41,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:41,859 INFO L82 PathProgramCache]: Analyzing trace with hash -432470954, now seen corresponding path program 318 times [2021-07-09 17:45:41,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:41,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066635891] [2021-07-09 17:45:41,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:41,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:41,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066635891] [2021-07-09 17:45:41,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066635891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:41,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881357758] [2021-07-09 17:45:41,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:42,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:45:42,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:42,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:42,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:42,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:42,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:42,104 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-07-09 17:45:42,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:45:42,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-07-09 17:45:42,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:42,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:42,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:42,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:42,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:42,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:42,222 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:42,223 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:42,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:42,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:42,275 INFO L628 ElimStorePlain]: treesize reduction 24, result has 72.1 percent of original size [2021-07-09 17:45:42,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:42,278 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:42,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:42,281 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:42,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:42,284 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:42,323 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-07-09 17:45:42,323 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-07-09 17:45:42,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:42,324 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:146, output treesize:34 [2021-07-09 17:45:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:42,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881357758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:42,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:42,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-07-09 17:45:42,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764008695] [2021-07-09 17:45:42,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:45:42,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:42,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:45:42,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:45:42,390 INFO L87 Difference]: Start difference. First operand 1684 states and 5870 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:43,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:43,289 INFO L93 Difference]: Finished difference Result 2020 states and 6804 transitions. [2021-07-09 17:45:43,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:45:43,289 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:43,292 INFO L225 Difference]: With dead ends: 2020 [2021-07-09 17:45:43,292 INFO L226 Difference]: Without dead ends: 1953 [2021-07-09 17:45:43,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 541.8ms TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:45:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-07-09 17:45:43,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1623. [2021-07-09 17:45:43,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 3.4494451294697903) internal successors, (5595), 1622 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:43,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5595 transitions. [2021-07-09 17:45:43,312 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5595 transitions. Word has length 24 [2021-07-09 17:45:43,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:43,312 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 5595 transitions. [2021-07-09 17:45:43,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:43,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5595 transitions. [2021-07-09 17:45:43,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:43,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:43,314 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:43,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6936,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:43,530 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:43,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:43,530 INFO L82 PathProgramCache]: Analyzing trace with hash 34433908, now seen corresponding path program 319 times [2021-07-09 17:45:43,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:43,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569936732] [2021-07-09 17:45:43,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:43,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:43,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569936732] [2021-07-09 17:45:43,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569936732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:43,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446235787] [2021-07-09 17:45:43,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:43,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:43,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:43,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446235787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:43,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:43,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-07-09 17:45:43,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171855264] [2021-07-09 17:45:43,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:45:43,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:43,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:45:43,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:45:43,943 INFO L87 Difference]: Start difference. First operand 1623 states and 5595 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:46,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:46,566 INFO L93 Difference]: Finished difference Result 2438 states and 7938 transitions. [2021-07-09 17:45:46,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 17:45:46,566 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:46,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:46,570 INFO L225 Difference]: With dead ends: 2438 [2021-07-09 17:45:46,570 INFO L226 Difference]: Without dead ends: 2254 [2021-07-09 17:45:46,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 2096.3ms TimeCoverageRelationStatistics Valid=574, Invalid=4682, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 17:45:46,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-07-09 17:45:46,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1641. [2021-07-09 17:45:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1640 states have (on average 3.479878048780488) internal successors, (5707), 1640 states have internal predecessors, (5707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 5707 transitions. [2021-07-09 17:45:46,593 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 5707 transitions. Word has length 24 [2021-07-09 17:45:46,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:46,593 INFO L482 AbstractCegarLoop]: Abstraction has 1641 states and 5707 transitions. [2021-07-09 17:45:46,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:46,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 5707 transitions. [2021-07-09 17:45:46,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:46,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:46,596 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:46,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6965,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:46,809 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:46,809 INFO L82 PathProgramCache]: Analyzing trace with hash 104543944, now seen corresponding path program 320 times [2021-07-09 17:45:46,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:46,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493078202] [2021-07-09 17:45:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:46,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:46,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493078202] [2021-07-09 17:45:46,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493078202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:46,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279578017] [2021-07-09 17:45:46,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:47,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:45:47,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:47,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:47,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:47,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:45:47,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:47,176 INFO L628 ElimStorePlain]: treesize reduction 58, result has 55.7 percent of original size [2021-07-09 17:45:47,176 INFO L518 ElimStorePlain]: Eliminatee v_prenex_266 vanished before elimination [2021-07-09 17:45:47,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:45:47,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:47,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:47,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:45:47,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:47,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:47,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:47,224 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:137, output treesize:62 [2021-07-09 17:45:47,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:47,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:47,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:47,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:47,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:47,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:47,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:47,336 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:47,396 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-07-09 17:45:47,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:47,398 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:47,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:47,401 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:47,446 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-07-09 17:45:47,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:45:47,447 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-07-09 17:45:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:47,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279578017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:47,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:47,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-07-09 17:45:47,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359538989] [2021-07-09 17:45:47,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:45:47,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:47,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:45:47,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:45:47,524 INFO L87 Difference]: Start difference. First operand 1641 states and 5707 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:49,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:49,076 INFO L93 Difference]: Finished difference Result 2328 states and 7668 transitions. [2021-07-09 17:45:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 17:45:49,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:49,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:49,080 INFO L225 Difference]: With dead ends: 2328 [2021-07-09 17:45:49,080 INFO L226 Difference]: Without dead ends: 2208 [2021-07-09 17:45:49,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1262.7ms TimeCoverageRelationStatistics Valid=507, Invalid=3275, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 17:45:49,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-07-09 17:45:49,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1656. [2021-07-09 17:45:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.4924471299093653) internal successors, (5780), 1655 states have internal predecessors, (5780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 5780 transitions. [2021-07-09 17:45:49,104 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 5780 transitions. Word has length 24 [2021-07-09 17:45:49,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:49,104 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 5780 transitions. [2021-07-09 17:45:49,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:49,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 5780 transitions. [2021-07-09 17:45:49,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:49,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:49,106 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:49,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6974,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:49,322 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:49,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:49,322 INFO L82 PathProgramCache]: Analyzing trace with hash 353509398, now seen corresponding path program 321 times [2021-07-09 17:45:49,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:49,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753023728] [2021-07-09 17:45:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:49,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:49,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753023728] [2021-07-09 17:45:49,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753023728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:49,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081305593] [2021-07-09 17:45:49,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:49,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:45:49,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:49,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:49,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:49,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081305593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:49,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:49,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-07-09 17:45:49,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528755972] [2021-07-09 17:45:49,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:45:49,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:49,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:45:49,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:45:49,704 INFO L87 Difference]: Start difference. First operand 1656 states and 5780 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:51,134 INFO L93 Difference]: Finished difference Result 2232 states and 7426 transitions. [2021-07-09 17:45:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 17:45:51,142 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:51,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:51,146 INFO L225 Difference]: With dead ends: 2232 [2021-07-09 17:45:51,146 INFO L226 Difference]: Without dead ends: 2058 [2021-07-09 17:45:51,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1100.0ms TimeCoverageRelationStatistics Valid=372, Invalid=3410, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 17:45:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-07-09 17:45:51,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1654. [2021-07-09 17:45:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.4827586206896552) internal successors, (5757), 1653 states have internal predecessors, (5757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:51,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5757 transitions. [2021-07-09 17:45:51,168 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5757 transitions. Word has length 24 [2021-07-09 17:45:51,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:51,168 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5757 transitions. [2021-07-09 17:45:51,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:51,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5757 transitions. [2021-07-09 17:45:51,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:51,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:51,170 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:51,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6985,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:51,385 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:51,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:51,385 INFO L82 PathProgramCache]: Analyzing trace with hash 643781646, now seen corresponding path program 322 times [2021-07-09 17:45:51,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:51,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977182455] [2021-07-09 17:45:51,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:51,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:51,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977182455] [2021-07-09 17:45:51,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977182455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:51,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156628786] [2021-07-09 17:45:51,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:51,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:45:51,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:51,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:51,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:51,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:51,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:51,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:51,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:51,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:51,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:51,658 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:45:51,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:51,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:51,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:51,663 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:51,686 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:45:51,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:45:51,687 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:45:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:51,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156628786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:51,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:51,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-07-09 17:45:51,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862810228] [2021-07-09 17:45:51,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:45:51,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:51,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:45:51,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:45:51,724 INFO L87 Difference]: Start difference. First operand 1654 states and 5757 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:52,487 INFO L93 Difference]: Finished difference Result 1923 states and 6557 transitions. [2021-07-09 17:45:52,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:45:52,487 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:52,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:52,491 INFO L225 Difference]: With dead ends: 1923 [2021-07-09 17:45:52,491 INFO L226 Difference]: Without dead ends: 1845 [2021-07-09 17:45:52,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 531.2ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:45:52,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2021-07-09 17:45:52,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 1635. [2021-07-09 17:45:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 3.4871481028151776) internal successors, (5698), 1634 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:52,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 5698 transitions. [2021-07-09 17:45:52,511 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 5698 transitions. Word has length 24 [2021-07-09 17:45:52,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:52,511 INFO L482 AbstractCegarLoop]: Abstraction has 1635 states and 5698 transitions. [2021-07-09 17:45:52,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:52,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 5698 transitions. [2021-07-09 17:45:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:52,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:52,513 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:52,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6994 [2021-07-09 17:45:52,729 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:52,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:52,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1570714054, now seen corresponding path program 323 times [2021-07-09 17:45:52,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:52,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473425358] [2021-07-09 17:45:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:52,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:52,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473425358] [2021-07-09 17:45:52,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473425358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:52,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060248945] [2021-07-09 17:45:52,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:52,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:45:52,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:52,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:52,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:53,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:53,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:53,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:53,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:53,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:53,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:53,051 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:45:53,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:53,054 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:53,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:53,056 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:53,079 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:45:53,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:45:53,080 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:45:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:53,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060248945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:53,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:53,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-07-09 17:45:53,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703810093] [2021-07-09 17:45:53,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:45:53,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:53,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:45:53,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:45:53,117 INFO L87 Difference]: Start difference. First operand 1635 states and 5698 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:53,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:53,798 INFO L93 Difference]: Finished difference Result 2066 states and 7013 transitions. [2021-07-09 17:45:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:45:53,798 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:53,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:53,802 INFO L225 Difference]: With dead ends: 2066 [2021-07-09 17:45:53,802 INFO L226 Difference]: Without dead ends: 1997 [2021-07-09 17:45:53,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 490.5ms TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:45:53,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2021-07-09 17:45:53,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1662. [2021-07-09 17:45:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.4942805538832027) internal successors, (5804), 1661 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:53,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5804 transitions. [2021-07-09 17:45:53,845 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5804 transitions. Word has length 24 [2021-07-09 17:45:53,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:53,845 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5804 transitions. [2021-07-09 17:45:53,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:53,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5804 transitions. [2021-07-09 17:45:53,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:53,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:53,847 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:54,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7000,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:54,061 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:54,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:54,061 INFO L82 PathProgramCache]: Analyzing trace with hash -395223410, now seen corresponding path program 324 times [2021-07-09 17:45:54,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:54,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184047317] [2021-07-09 17:45:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:54,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:54,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184047317] [2021-07-09 17:45:54,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184047317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:54,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823182859] [2021-07-09 17:45:54,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:54,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:45:54,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:54,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:54,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:54,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823182859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:54,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:54,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:45:54,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760843449] [2021-07-09 17:45:54,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:45:54,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:54,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:45:54,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:45:54,379 INFO L87 Difference]: Start difference. First operand 1662 states and 5804 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:55,042 INFO L93 Difference]: Finished difference Result 2132 states and 7230 transitions. [2021-07-09 17:45:55,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:45:55,042 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:55,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:55,046 INFO L225 Difference]: With dead ends: 2132 [2021-07-09 17:45:55,046 INFO L226 Difference]: Without dead ends: 2072 [2021-07-09 17:45:55,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 501.8ms TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:45:55,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-07-09 17:45:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1695. [2021-07-09 17:45:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 3.52125147579693) internal successors, (5965), 1694 states have internal predecessors, (5965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 5965 transitions. [2021-07-09 17:45:55,068 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 5965 transitions. Word has length 24 [2021-07-09 17:45:55,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:55,068 INFO L482 AbstractCegarLoop]: Abstraction has 1695 states and 5965 transitions. [2021-07-09 17:45:55,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:55,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 5965 transitions. [2021-07-09 17:45:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:55,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:55,070 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:55,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7007 [2021-07-09 17:45:55,286 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:55,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:55,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1218343324, now seen corresponding path program 325 times [2021-07-09 17:45:55,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:55,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253471524] [2021-07-09 17:45:55,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:55,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:55,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253471524] [2021-07-09 17:45:55,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253471524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:55,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206990657] [2021-07-09 17:45:55,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:55,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:55,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:55,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:55,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206990657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:55,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:55,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:45:55,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104007572] [2021-07-09 17:45:55,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:45:55,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:55,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:45:55,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:45:55,576 INFO L87 Difference]: Start difference. First operand 1695 states and 5965 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:56,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:56,317 INFO L93 Difference]: Finished difference Result 1988 states and 6783 transitions. [2021-07-09 17:45:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:45:56,318 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:56,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:56,321 INFO L225 Difference]: With dead ends: 1988 [2021-07-09 17:45:56,321 INFO L226 Difference]: Without dead ends: 1919 [2021-07-09 17:45:56,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 407.4ms TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:45:56,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-07-09 17:45:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1622. [2021-07-09 17:45:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.4818013571869217) internal successors, (5644), 1621 states have internal predecessors, (5644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:56,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5644 transitions. [2021-07-09 17:45:56,341 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5644 transitions. Word has length 24 [2021-07-09 17:45:56,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:56,341 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5644 transitions. [2021-07-09 17:45:56,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:56,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5644 transitions. [2021-07-09 17:45:56,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:56,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:56,343 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:56,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7016 [2021-07-09 17:45:56,557 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:56,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:56,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1500604018, now seen corresponding path program 326 times [2021-07-09 17:45:56,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:56,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130101517] [2021-07-09 17:45:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:56,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:56,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130101517] [2021-07-09 17:45:56,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130101517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:56,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342941431] [2021-07-09 17:45:56,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:56,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:45:56,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:56,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:56,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:56,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:56,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:56,803 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-07-09 17:45:56,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:45:56,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-07-09 17:45:56,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:56,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:56,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:56,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:56,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:56,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:56,879 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:45:56,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:56,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:56,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:56,885 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:56,910 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:45:56,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:45:56,911 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:45:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:56,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342941431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:56,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:56,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-07-09 17:45:56,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858699645] [2021-07-09 17:45:56,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:45:56,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:56,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:45:56,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:45:56,957 INFO L87 Difference]: Start difference. First operand 1622 states and 5644 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:57,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:57,673 INFO L93 Difference]: Finished difference Result 1893 states and 6482 transitions. [2021-07-09 17:45:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:45:57,674 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:57,677 INFO L225 Difference]: With dead ends: 1893 [2021-07-09 17:45:57,677 INFO L226 Difference]: Without dead ends: 1824 [2021-07-09 17:45:57,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 509.8ms TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:45:57,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-07-09 17:45:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1651. [2021-07-09 17:45:57,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.4903030303030302) internal successors, (5759), 1650 states have internal predecessors, (5759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:57,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5759 transitions. [2021-07-09 17:45:57,696 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5759 transitions. Word has length 24 [2021-07-09 17:45:57,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:57,696 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5759 transitions. [2021-07-09 17:45:57,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:57,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5759 transitions. [2021-07-09 17:45:57,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:57,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:57,698 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:57,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7025,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:57,914 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:57,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:57,914 INFO L82 PathProgramCache]: Analyzing trace with hash -325113374, now seen corresponding path program 327 times [2021-07-09 17:45:57,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:57,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135389006] [2021-07-09 17:45:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:58,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:58,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135389006] [2021-07-09 17:45:58,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135389006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:58,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215427585] [2021-07-09 17:45:58,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:58,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:45:58,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:58,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:58,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:58,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:58,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:58,201 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-07-09 17:45:58,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:58,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:58,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:45:58,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:45:58,213 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-07-09 17:45:58,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:58,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:58,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:58,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:58,385 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:58,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:58,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:58,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:58,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:58,391 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:58,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:58,394 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:58,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:58,397 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:58,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:45:58,400 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:58,468 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.8 percent of original size [2021-07-09 17:45:58,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:58,471 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:58,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:58,475 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:58,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:58,478 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:58,523 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.4 percent of original size [2021-07-09 17:45:58,524 INFO L518 ElimStorePlain]: Eliminatee v_prenex_270 vanished before elimination [2021-07-09 17:45:58,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:45:58,525 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:201, output treesize:34 [2021-07-09 17:45:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:45:58,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215427585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:58,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:45:58,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:45:58,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121571866] [2021-07-09 17:45:58,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:45:58,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:45:58,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:45:58,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:45:58,606 INFO L87 Difference]: Start difference. First operand 1651 states and 5759 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:45:59,212 INFO L93 Difference]: Finished difference Result 2065 states and 7023 transitions. [2021-07-09 17:45:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:45:59,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:45:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:45:59,216 INFO L225 Difference]: With dead ends: 2065 [2021-07-09 17:45:59,216 INFO L226 Difference]: Without dead ends: 2005 [2021-07-09 17:45:59,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 482.8ms TimeCoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:45:59,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2021-07-09 17:45:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1683. [2021-07-09 17:45:59,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.5172413793103448) internal successors, (5916), 1682 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:59,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5916 transitions. [2021-07-09 17:45:59,238 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5916 transitions. Word has length 24 [2021-07-09 17:45:59,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:45:59,238 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5916 transitions. [2021-07-09 17:45:59,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:45:59,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5916 transitions. [2021-07-09 17:45:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:45:59,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:45:59,240 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:45:59,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7032 [2021-07-09 17:45:59,456 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:45:59,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:45:59,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1288453360, now seen corresponding path program 328 times [2021-07-09 17:45:59,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:45:59,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94770174] [2021-07-09 17:45:59,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:45:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:45:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:45:59,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:45:59,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94770174] [2021-07-09 17:45:59,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94770174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:45:59,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358924098] [2021-07-09 17:45:59,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:45:59,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:45:59,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:45:59,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:45:59,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:45:59,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:59,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:59,733 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-07-09 17:45:59,733 INFO L518 ElimStorePlain]: Eliminatee v_prenex_271 vanished before elimination [2021-07-09 17:45:59,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:45:59,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-07-09 17:45:59,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:59,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:59,980 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-07-09 17:45:59,980 INFO L628 ElimStorePlain]: treesize reduction 95, result has 49.7 percent of original size [2021-07-09 17:45:59,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:59,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:59,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:59,987 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:59,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:45:59,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:45:59,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:45:59,994 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:00,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:00,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:00,034 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:00,101 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.1 percent of original size [2021-07-09 17:46:00,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:00,105 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:00,152 INFO L628 ElimStorePlain]: treesize reduction 16, result has 76.8 percent of original size [2021-07-09 17:46:00,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:00,156 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:00,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:00,177 INFO L518 ElimStorePlain]: Eliminatee v_prenex_273 vanished before elimination [2021-07-09 17:46:00,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:00,179 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:192, output treesize:34 [2021-07-09 17:46:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:46:00,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358924098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:00,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:00,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:46:00,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275931792] [2021-07-09 17:46:00,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:46:00,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:00,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:46:00,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:46:00,257 INFO L87 Difference]: Start difference. First operand 1683 states and 5916 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:01,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:01,050 INFO L93 Difference]: Finished difference Result 1987 states and 6778 transitions. [2021-07-09 17:46:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:46:01,051 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:01,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:01,054 INFO L225 Difference]: With dead ends: 1987 [2021-07-09 17:46:01,054 INFO L226 Difference]: Without dead ends: 1920 [2021-07-09 17:46:01,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 584.4ms TimeCoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:46:01,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-07-09 17:46:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1620. [2021-07-09 17:46:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.4793082149474985) internal successors, (5633), 1619 states have internal predecessors, (5633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:01,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5633 transitions. [2021-07-09 17:46:01,074 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5633 transitions. Word has length 24 [2021-07-09 17:46:01,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:01,074 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5633 transitions. [2021-07-09 17:46:01,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:01,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5633 transitions. [2021-07-09 17:46:01,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:01,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:01,076 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:01,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7098 [2021-07-09 17:46:01,293 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:01,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1849886158, now seen corresponding path program 329 times [2021-07-09 17:46:01,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:01,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775869961] [2021-07-09 17:46:01,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:01,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:01,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775869961] [2021-07-09 17:46:01,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775869961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:01,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648121342] [2021-07-09 17:46:01,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:01,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:46:01,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:01,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:01,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:01,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:01,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:01,586 INFO L628 ElimStorePlain]: treesize reduction 48, result has 57.5 percent of original size [2021-07-09 17:46:01,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:01,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:01,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:01,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:01,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:01,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:01,674 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-07-09 17:46:01,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:01,675 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:117, output treesize:58 [2021-07-09 17:46:01,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:01,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:01,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:01,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:01,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:01,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:01,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:01,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:01,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:01,798 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-07-09 17:46:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:46:01,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648121342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:01,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:01,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-09 17:46:01,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355062303] [2021-07-09 17:46:01,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:46:01,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:01,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:46:01,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:46:01,829 INFO L87 Difference]: Start difference. First operand 1620 states and 5633 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:02,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:02,647 INFO L93 Difference]: Finished difference Result 1842 states and 6264 transitions. [2021-07-09 17:46:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:46:02,647 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:02,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:02,650 INFO L225 Difference]: With dead ends: 1842 [2021-07-09 17:46:02,650 INFO L226 Difference]: Without dead ends: 1767 [2021-07-09 17:46:02,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 597.6ms TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:46:02,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-07-09 17:46:02,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1620. [2021-07-09 17:46:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.465101914762199) internal successors, (5610), 1619 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:02,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5610 transitions. [2021-07-09 17:46:02,670 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5610 transitions. Word has length 24 [2021-07-09 17:46:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:02,670 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5610 transitions. [2021-07-09 17:46:02,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5610 transitions. [2021-07-09 17:46:02,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:02,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:02,672 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:02,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7128,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:02,888 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:02,889 INFO L82 PathProgramCache]: Analyzing trace with hash 672807098, now seen corresponding path program 330 times [2021-07-09 17:46:02,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:02,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519397845] [2021-07-09 17:46:02,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:02,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:02,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519397845] [2021-07-09 17:46:02,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519397845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:02,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201016096] [2021-07-09 17:46:02,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:03,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:46:03,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:03,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:03,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:03,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:46:03,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:03,137 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-07-09 17:46:03,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:03,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:03,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:03,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:03,148 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-07-09 17:46:03,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:03,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:03,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:03,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:03,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:03,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:03,232 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-07-09 17:46:03,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:03,235 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:03,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:03,238 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:03,263 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-07-09 17:46:03,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:03,264 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-07-09 17:46:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:46:03,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201016096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:03,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:03,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-07-09 17:46:03,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704891704] [2021-07-09 17:46:03,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:46:03,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:03,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:46:03,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:46:03,311 INFO L87 Difference]: Start difference. First operand 1620 states and 5610 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:04,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:04,095 INFO L93 Difference]: Finished difference Result 1843 states and 6268 transitions. [2021-07-09 17:46:04,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:46:04,096 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:04,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:04,099 INFO L225 Difference]: With dead ends: 1843 [2021-07-09 17:46:04,099 INFO L226 Difference]: Without dead ends: 1774 [2021-07-09 17:46:04,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 478.8ms TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:46:04,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2021-07-09 17:46:04,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 1601. [2021-07-09 17:46:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 3.465625) internal successors, (5545), 1600 states have internal predecessors, (5545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:04,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5545 transitions. [2021-07-09 17:46:04,118 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5545 transitions. Word has length 24 [2021-07-09 17:46:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:04,118 INFO L482 AbstractCegarLoop]: Abstraction has 1601 states and 5545 transitions. [2021-07-09 17:46:04,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5545 transitions. [2021-07-09 17:46:04,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:04,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:04,120 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:04,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7140,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:04,336 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:04,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:04,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1848297742, now seen corresponding path program 331 times [2021-07-09 17:46:04,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:04,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976029060] [2021-07-09 17:46:04,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:04,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:04,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976029060] [2021-07-09 17:46:04,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976029060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:04,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898257766] [2021-07-09 17:46:04,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:04,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:04,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:46:04,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898257766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:04,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:04,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-07-09 17:46:04,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279931858] [2021-07-09 17:46:04,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:46:04,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:04,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:46:04,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:46:04,713 INFO L87 Difference]: Start difference. First operand 1601 states and 5545 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:06,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:06,772 INFO L93 Difference]: Finished difference Result 2411 states and 7945 transitions. [2021-07-09 17:46:06,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 17:46:06,772 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:06,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:06,776 INFO L225 Difference]: With dead ends: 2411 [2021-07-09 17:46:06,776 INFO L226 Difference]: Without dead ends: 2263 [2021-07-09 17:46:06,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 1610.7ms TimeCoverageRelationStatistics Valid=543, Invalid=4149, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 17:46:06,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-07-09 17:46:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 1593. [2021-07-09 17:46:06,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.4673366834170856) internal successors, (5520), 1592 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:06,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5520 transitions. [2021-07-09 17:46:06,799 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5520 transitions. Word has length 24 [2021-07-09 17:46:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:06,799 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5520 transitions. [2021-07-09 17:46:06,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:06,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5520 transitions. [2021-07-09 17:46:06,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:06,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:06,802 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:07,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7147 [2021-07-09 17:46:07,010 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:07,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:07,011 INFO L82 PathProgramCache]: Analyzing trace with hash -366197958, now seen corresponding path program 332 times [2021-07-09 17:46:07,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:07,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309934038] [2021-07-09 17:46:07,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:07,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:07,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309934038] [2021-07-09 17:46:07,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309934038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:07,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515355357] [2021-07-09 17:46:07,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:07,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:46:07,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:07,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:07,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:46:07,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515355357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:07,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:07,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-07-09 17:46:07,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043625445] [2021-07-09 17:46:07,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:46:07,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:07,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:46:07,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:46:07,404 INFO L87 Difference]: Start difference. First operand 1593 states and 5520 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:09,951 INFO L93 Difference]: Finished difference Result 2287 states and 7567 transitions. [2021-07-09 17:46:09,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 17:46:09,951 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:09,955 INFO L225 Difference]: With dead ends: 2287 [2021-07-09 17:46:09,955 INFO L226 Difference]: Without dead ends: 2127 [2021-07-09 17:46:09,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 1946.1ms TimeCoverageRelationStatistics Valid=596, Invalid=4806, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 17:46:09,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-07-09 17:46:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1582. [2021-07-09 17:46:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.476913345983555) internal successors, (5497), 1581 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:09,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5497 transitions. [2021-07-09 17:46:09,977 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5497 transitions. Word has length 24 [2021-07-09 17:46:09,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:09,977 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 5497 transitions. [2021-07-09 17:46:09,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:09,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5497 transitions. [2021-07-09 17:46:09,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:09,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:09,980 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:10,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7154,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:10,193 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:10,193 INFO L82 PathProgramCache]: Analyzing trace with hash -296087922, now seen corresponding path program 333 times [2021-07-09 17:46:10,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:10,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774229470] [2021-07-09 17:46:10,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:10,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:10,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774229470] [2021-07-09 17:46:10,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774229470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:10,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273965332] [2021-07-09 17:46:10,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:10,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:46:10,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:10,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:10,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:10,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:46:10,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:10,557 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.3 percent of original size [2021-07-09 17:46:10,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:46:10,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:10,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:10,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:46:10,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:10,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:46:10,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:10,661 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-07-09 17:46:10,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:10,662 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:111, output treesize:62 [2021-07-09 17:46:10,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:10,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:10,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:10,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:10,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:10,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:10,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:10,788 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:10,855 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-07-09 17:46:10,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:10,859 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:10,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:10,862 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:10,919 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-07-09 17:46:10,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:46:10,920 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-07-09 17:46:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:46:11,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273965332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:11,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:11,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 17:46:11,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386962768] [2021-07-09 17:46:11,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:46:11,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:11,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:46:11,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:46:11,010 INFO L87 Difference]: Start difference. First operand 1582 states and 5497 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:11,861 INFO L93 Difference]: Finished difference Result 1916 states and 6490 transitions. [2021-07-09 17:46:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:46:11,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:11,864 INFO L225 Difference]: With dead ends: 1916 [2021-07-09 17:46:11,864 INFO L226 Difference]: Without dead ends: 1856 [2021-07-09 17:46:11,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 658.4ms TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:46:11,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-07-09 17:46:11,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1606. [2021-07-09 17:46:11,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 3.485981308411215) internal successors, (5595), 1605 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 5595 transitions. [2021-07-09 17:46:11,884 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 5595 transitions. Word has length 24 [2021-07-09 17:46:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:11,884 INFO L482 AbstractCegarLoop]: Abstraction has 1606 states and 5595 transitions. [2021-07-09 17:46:11,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 5595 transitions. [2021-07-09 17:46:11,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:11,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:11,886 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:12,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7164 [2021-07-09 17:46:12,101 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:12,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:12,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1317478812, now seen corresponding path program 334 times [2021-07-09 17:46:12,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:12,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120028670] [2021-07-09 17:46:12,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:12,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:12,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120028670] [2021-07-09 17:46:12,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120028670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:12,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654593681] [2021-07-09 17:46:12,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:12,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:46:12,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:12,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:12,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:12,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:46:12,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:12,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:46:12,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:12,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:46:12,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:12,407 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-07-09 17:46:12,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:46:12,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:12,464 INFO L628 ElimStorePlain]: treesize reduction 26, result has 72.0 percent of original size [2021-07-09 17:46:12,464 INFO L518 ElimStorePlain]: Eliminatee v_prenex_282 vanished before elimination [2021-07-09 17:46:12,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:12,465 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:142, output treesize:67 [2021-07-09 17:46:12,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:12,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:12,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:12,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:12,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:12,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:12,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:12,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:12,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:12,586 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:12,644 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.3 percent of original size [2021-07-09 17:46:12,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:12,647 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:12,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:12,650 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:12,692 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-07-09 17:46:12,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:12,694 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:111, output treesize:34 [2021-07-09 17:46:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:46:12,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654593681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:12,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:12,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 17:46:12,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200945086] [2021-07-09 17:46:12,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:46:12,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:12,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:46:12,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:46:12,774 INFO L87 Difference]: Start difference. First operand 1606 states and 5595 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:13,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:13,922 INFO L93 Difference]: Finished difference Result 1985 states and 6653 transitions. [2021-07-09 17:46:13,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:46:13,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:13,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:13,926 INFO L225 Difference]: With dead ends: 1985 [2021-07-09 17:46:13,926 INFO L226 Difference]: Without dead ends: 1906 [2021-07-09 17:46:13,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 949.8ms TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:46:13,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-07-09 17:46:13,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1545. [2021-07-09 17:46:13,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.461139896373057) internal successors, (5344), 1544 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5344 transitions. [2021-07-09 17:46:13,947 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5344 transitions. Word has length 24 [2021-07-09 17:46:13,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:13,947 INFO L482 AbstractCegarLoop]: Abstraction has 1545 states and 5344 transitions. [2021-07-09 17:46:13,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:13,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5344 transitions. [2021-07-09 17:46:13,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:13,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:13,949 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:14,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7180,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:14,166 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:14,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:14,166 INFO L82 PathProgramCache]: Analyzing trace with hash -201559986, now seen corresponding path program 335 times [2021-07-09 17:46:14,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:14,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266133488] [2021-07-09 17:46:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:14,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:14,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266133488] [2021-07-09 17:46:14,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266133488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:14,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255719176] [2021-07-09 17:46:14,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:14,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:46:14,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:14,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:14,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:14,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:46:14,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:14,518 INFO L628 ElimStorePlain]: treesize reduction 31, result has 81.3 percent of original size [2021-07-09 17:46:14,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:46:14,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:14,621 INFO L628 ElimStorePlain]: treesize reduction 6, result has 95.4 percent of original size [2021-07-09 17:46:14,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:46:14,625 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:14,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:46:14,628 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:14,684 INFO L628 ElimStorePlain]: treesize reduction 50, result has 55.4 percent of original size [2021-07-09 17:46:14,684 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-07-09 17:46:14,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:14,685 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:171, output treesize:62 [2021-07-09 17:46:14,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:14,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:14,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:14,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:14,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:14,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:14,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:14,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:14,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:14,851 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-07-09 17:46:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:46:14,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255719176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:14,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:14,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 17:46:14,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52702021] [2021-07-09 17:46:14,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:46:14,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:14,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:46:14,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:46:14,884 INFO L87 Difference]: Start difference. First operand 1545 states and 5344 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:15,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:15,893 INFO L93 Difference]: Finished difference Result 1877 states and 6305 transitions. [2021-07-09 17:46:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:46:15,893 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:15,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:15,896 INFO L225 Difference]: With dead ends: 1877 [2021-07-09 17:46:15,896 INFO L226 Difference]: Without dead ends: 1800 [2021-07-09 17:46:15,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 806.3ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:46:15,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2021-07-09 17:46:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1534. [2021-07-09 17:46:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 3.4494455316373123) internal successors, (5288), 1533 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 5288 transitions. [2021-07-09 17:46:15,915 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 5288 transitions. Word has length 24 [2021-07-09 17:46:15,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:15,915 INFO L482 AbstractCegarLoop]: Abstraction has 1534 states and 5288 transitions. [2021-07-09 17:46:15,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 5288 transitions. [2021-07-09 17:46:15,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:15,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:15,917 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:16,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7197 [2021-07-09 17:46:16,133 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:16,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:16,133 INFO L82 PathProgramCache]: Analyzing trace with hash -47122468, now seen corresponding path program 336 times [2021-07-09 17:46:16,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:16,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271041450] [2021-07-09 17:46:16,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:16,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:16,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271041450] [2021-07-09 17:46:16,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271041450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:16,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460990035] [2021-07-09 17:46:16,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:16,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:46:16,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:16,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:16,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:16,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:46:16,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:16,450 INFO L628 ElimStorePlain]: treesize reduction 32, result has 75.8 percent of original size [2021-07-09 17:46:16,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:46:16,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:16,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:16,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:46:16,494 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:16,551 INFO L628 ElimStorePlain]: treesize reduction 21, result has 76.1 percent of original size [2021-07-09 17:46:16,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:46:16,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:16,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:16,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:16,583 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:62 [2021-07-09 17:46:16,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:16,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:16,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:16,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:16,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:16,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:16,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:16,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:16,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:16,735 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-07-09 17:46:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:46:16,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460990035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:16,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:16,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 17:46:16,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792240819] [2021-07-09 17:46:16,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:46:16,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:16,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:46:16,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:46:16,769 INFO L87 Difference]: Start difference. First operand 1534 states and 5288 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:17,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:17,543 INFO L93 Difference]: Finished difference Result 1768 states and 5949 transitions. [2021-07-09 17:46:17,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:46:17,543 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:17,546 INFO L225 Difference]: With dead ends: 1768 [2021-07-09 17:46:17,546 INFO L226 Difference]: Without dead ends: 1677 [2021-07-09 17:46:17,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 658.0ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:46:17,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2021-07-09 17:46:17,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1513. [2021-07-09 17:46:17,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 3.447089947089947) internal successors, (5212), 1512 states have internal predecessors, (5212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 5212 transitions. [2021-07-09 17:46:17,562 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 5212 transitions. Word has length 24 [2021-07-09 17:46:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:17,562 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 5212 transitions. [2021-07-09 17:46:17,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 5212 transitions. [2021-07-09 17:46:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:17,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:17,564 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:17,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7211 [2021-07-09 17:46:17,778 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:17,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:17,778 INFO L82 PathProgramCache]: Analyzing trace with hash -841957494, now seen corresponding path program 337 times [2021-07-09 17:46:17,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:17,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566148353] [2021-07-09 17:46:17,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:17,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:17,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566148353] [2021-07-09 17:46:17,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566148353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:17,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895923728] [2021-07-09 17:46:17,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:18,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:18,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:18,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895923728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:18,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:18,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-09 17:46:18,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222392595] [2021-07-09 17:46:18,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:18,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:18,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:18,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:18,206 INFO L87 Difference]: Start difference. First operand 1513 states and 5212 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:20,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:20,741 INFO L93 Difference]: Finished difference Result 2288 states and 7400 transitions. [2021-07-09 17:46:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 17:46:20,741 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:20,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:20,745 INFO L225 Difference]: With dead ends: 2288 [2021-07-09 17:46:20,745 INFO L226 Difference]: Without dead ends: 2168 [2021-07-09 17:46:20,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1986.9ms TimeCoverageRelationStatistics Valid=573, Invalid=3849, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 17:46:20,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-07-09 17:46:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1520. [2021-07-09 17:46:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.4476629361421987) internal successors, (5237), 1519 states have internal predecessors, (5237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:20,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 5237 transitions. [2021-07-09 17:46:20,769 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 5237 transitions. Word has length 24 [2021-07-09 17:46:20,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:20,769 INFO L482 AbstractCegarLoop]: Abstraction has 1520 states and 5237 transitions. [2021-07-09 17:46:20,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:20,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 5237 transitions. [2021-07-09 17:46:20,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:20,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:20,771 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:20,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7224 [2021-07-09 17:46:20,978 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:20,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:20,978 INFO L82 PathProgramCache]: Analyzing trace with hash 771609240, now seen corresponding path program 338 times [2021-07-09 17:46:20,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:20,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151979525] [2021-07-09 17:46:20,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:21,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:21,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151979525] [2021-07-09 17:46:21,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151979525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:21,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878124120] [2021-07-09 17:46:21,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:21,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:46:21,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:21,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:21,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:21,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878124120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:21,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:21,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-07-09 17:46:21,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373098221] [2021-07-09 17:46:21,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:46:21,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:21,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:46:21,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:46:21,541 INFO L87 Difference]: Start difference. First operand 1520 states and 5237 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:24,293 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-07-09 17:46:24,668 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2021-07-09 17:46:24,935 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-07-09 17:46:25,622 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-07-09 17:46:25,975 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-07-09 17:46:26,123 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-07-09 17:46:26,662 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-07-09 17:46:26,855 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-07-09 17:46:26,981 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-09 17:46:27,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:27,191 INFO L93 Difference]: Finished difference Result 3187 states and 9796 transitions. [2021-07-09 17:46:27,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-09 17:46:27,191 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:27,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:27,196 INFO L225 Difference]: With dead ends: 3187 [2021-07-09 17:46:27,196 INFO L226 Difference]: Without dead ends: 2927 [2021-07-09 17:46:27,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 4940.4ms TimeCoverageRelationStatistics Valid=1010, Invalid=7180, Unknown=0, NotChecked=0, Total=8190 [2021-07-09 17:46:27,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-07-09 17:46:27,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 1494. [2021-07-09 17:46:27,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.4166108506363027) internal successors, (5101), 1493 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 5101 transitions. [2021-07-09 17:46:27,223 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 5101 transitions. Word has length 24 [2021-07-09 17:46:27,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:27,223 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 5101 transitions. [2021-07-09 17:46:27,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:27,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 5101 transitions. [2021-07-09 17:46:27,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:27,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:27,225 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:27,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7232 [2021-07-09 17:46:27,442 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:27,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1854467236, now seen corresponding path program 339 times [2021-07-09 17:46:27,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:27,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279558633] [2021-07-09 17:46:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:27,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:27,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279558633] [2021-07-09 17:46:27,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279558633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:27,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031208577] [2021-07-09 17:46:27,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:27,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:46:27,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:27,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:27,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:27,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:27,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:27,839 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-07-09 17:46:27,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:27,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:27,903 INFO L628 ElimStorePlain]: treesize reduction 22, result has 79.8 percent of original size [2021-07-09 17:46:27,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:27,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:27,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:27,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:27,937 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:27,978 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-07-09 17:46:27,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-07-09 17:46:27,981 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:117, output treesize:61 [2021-07-09 17:46:28,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:28,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:28,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:28,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:46:28,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:28,196 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.8 percent of original size [2021-07-09 17:46:28,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:28,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:28,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:28,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:28,208 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:73, output treesize:11 [2021-07-09 17:46:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:28,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031208577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:28,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:28,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-09 17:46:28,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419547812] [2021-07-09 17:46:28,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:46:28,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:28,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:46:28,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:46:28,244 INFO L87 Difference]: Start difference. First operand 1494 states and 5101 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:29,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:29,395 INFO L93 Difference]: Finished difference Result 1883 states and 6189 transitions. [2021-07-09 17:46:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:46:29,395 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:29,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:29,398 INFO L225 Difference]: With dead ends: 1883 [2021-07-09 17:46:29,398 INFO L226 Difference]: Without dead ends: 1784 [2021-07-09 17:46:29,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 970.6ms TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:46:29,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-07-09 17:46:29,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1474. [2021-07-09 17:46:29,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.415478615071283) internal successors, (5031), 1473 states have internal predecessors, (5031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 5031 transitions. [2021-07-09 17:46:29,416 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 5031 transitions. Word has length 24 [2021-07-09 17:46:29,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:29,417 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 5031 transitions. [2021-07-09 17:46:29,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:29,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 5031 transitions. [2021-07-09 17:46:29,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:29,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:29,418 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:29,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7240 [2021-07-09 17:46:29,633 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:29,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:29,633 INFO L82 PathProgramCache]: Analyzing trace with hash 27651606, now seen corresponding path program 340 times [2021-07-09 17:46:29,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:29,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38661490] [2021-07-09 17:46:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:29,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:29,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38661490] [2021-07-09 17:46:29,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38661490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:29,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355908043] [2021-07-09 17:46:29,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:29,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:46:29,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:29,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:29,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:29,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:46:29,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:29,903 INFO L628 ElimStorePlain]: treesize reduction 63, result has 61.3 percent of original size [2021-07-09 17:46:29,903 INFO L518 ElimStorePlain]: Eliminatee v_prenex_297 vanished before elimination [2021-07-09 17:46:29,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:46:29,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:29,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:46:29,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:29,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:29,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:46:29,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:29,963 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-07-09 17:46:29,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:29,964 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:168, output treesize:62 [2021-07-09 17:46:30,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:30,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:30,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:30,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:30,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:30,060 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:30,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:30,063 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:30,143 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-07-09 17:46:30,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:30,147 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:30,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:30,150 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:30,208 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-07-09 17:46:30,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:46:30,209 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-07-09 17:46:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:30,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355908043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:30,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:30,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 17:46:30,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441765530] [2021-07-09 17:46:30,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:46:30,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:30,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:46:30,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:46:30,298 INFO L87 Difference]: Start difference. First operand 1474 states and 5031 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:31,454 INFO L93 Difference]: Finished difference Result 1848 states and 6050 transitions. [2021-07-09 17:46:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:46:31,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:31,458 INFO L225 Difference]: With dead ends: 1848 [2021-07-09 17:46:31,458 INFO L226 Difference]: Without dead ends: 1765 [2021-07-09 17:46:31,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 906.6ms TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:46:31,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-07-09 17:46:31,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1442. [2021-07-09 17:46:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3795975017349065) internal successors, (4870), 1441 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4870 transitions. [2021-07-09 17:46:31,475 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4870 transitions. Word has length 24 [2021-07-09 17:46:31,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:31,475 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4870 transitions. [2021-07-09 17:46:31,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:31,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4870 transitions. [2021-07-09 17:46:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:31,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:31,477 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:31,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7276,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:31,693 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:31,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:31,693 INFO L82 PathProgramCache]: Analyzing trace with hash 520247368, now seen corresponding path program 341 times [2021-07-09 17:46:31,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:31,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432583966] [2021-07-09 17:46:31,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:31,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:31,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432583966] [2021-07-09 17:46:31,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432583966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:31,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158706591] [2021-07-09 17:46:31,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:31,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:46:31,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:31,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:31,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:31,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:46:31,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:32,006 INFO L628 ElimStorePlain]: treesize reduction 63, result has 61.3 percent of original size [2021-07-09 17:46:32,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:46:32,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:32,059 INFO L628 ElimStorePlain]: treesize reduction 21, result has 77.7 percent of original size [2021-07-09 17:46:32,059 INFO L518 ElimStorePlain]: Eliminatee v_prenex_301 vanished before elimination [2021-07-09 17:46:32,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-07-09 17:46:32,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:32,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-07-09 17:46:32,064 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:32,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:32,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:32,086 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:168, output treesize:62 [2021-07-09 17:46:32,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:32,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:32,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:32,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:32,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:32,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:32,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:32,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:32,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:32,230 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-07-09 17:46:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:32,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158706591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:32,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:32,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-09 17:46:32,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555350979] [2021-07-09 17:46:32,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:46:32,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:32,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:46:32,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:46:32,264 INFO L87 Difference]: Start difference. First operand 1442 states and 4870 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:33,153 INFO L93 Difference]: Finished difference Result 1760 states and 5793 transitions. [2021-07-09 17:46:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:46:33,154 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:33,156 INFO L225 Difference]: With dead ends: 1760 [2021-07-09 17:46:33,156 INFO L226 Difference]: Without dead ends: 1657 [2021-07-09 17:46:33,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 684.6ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:46:33,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-07-09 17:46:33,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1376. [2021-07-09 17:46:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 3.3767272727272726) internal successors, (4643), 1375 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 4643 transitions. [2021-07-09 17:46:33,172 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 4643 transitions. Word has length 24 [2021-07-09 17:46:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:33,172 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 4643 transitions. [2021-07-09 17:46:33,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 4643 transitions. [2021-07-09 17:46:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:33,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:33,174 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:33,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7291 [2021-07-09 17:46:33,391 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:33,391 INFO L82 PathProgramCache]: Analyzing trace with hash 326699018, now seen corresponding path program 342 times [2021-07-09 17:46:33,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:33,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633258366] [2021-07-09 17:46:33,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:33,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:33,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633258366] [2021-07-09 17:46:33,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633258366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:33,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664071429] [2021-07-09 17:46:33,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:33,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:46:33,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:33,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:33,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:33,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:33,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:33,689 INFO L628 ElimStorePlain]: treesize reduction 53, result has 55.1 percent of original size [2021-07-09 17:46:33,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:33,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:33,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:33,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:33,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:33,715 INFO L518 ElimStorePlain]: Eliminatee v_prenex_303 vanished before elimination [2021-07-09 17:46:33,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:33,715 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:122, output treesize:58 [2021-07-09 17:46:33,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:33,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:33,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:33,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:33,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:33,800 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:33,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:33,803 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:33,864 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-07-09 17:46:33,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:33,867 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:33,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:33,869 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:33,914 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-07-09 17:46:33,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:46:33,915 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-07-09 17:46:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:33,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664071429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:33,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:33,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-07-09 17:46:33,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081623118] [2021-07-09 17:46:33,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:46:33,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:33,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:46:33,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:46:33,978 INFO L87 Difference]: Start difference. First operand 1376 states and 4643 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:34,634 INFO L93 Difference]: Finished difference Result 1650 states and 5378 transitions. [2021-07-09 17:46:34,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:46:34,634 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:34,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:34,637 INFO L225 Difference]: With dead ends: 1650 [2021-07-09 17:46:34,637 INFO L226 Difference]: Without dead ends: 1576 [2021-07-09 17:46:34,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 527.9ms TimeCoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:46:34,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-07-09 17:46:34,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1358. [2021-07-09 17:46:34,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 3.3559322033898304) internal successors, (4554), 1357 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:34,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 4554 transitions. [2021-07-09 17:46:34,655 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 4554 transitions. Word has length 24 [2021-07-09 17:46:34,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:34,655 INFO L482 AbstractCegarLoop]: Abstraction has 1358 states and 4554 transitions. [2021-07-09 17:46:34,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:34,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 4554 transitions. [2021-07-09 17:46:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:34,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:34,657 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:34,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7304,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:34,873 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:34,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:34,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1617240540, now seen corresponding path program 343 times [2021-07-09 17:46:34,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:34,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761045425] [2021-07-09 17:46:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:34,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:34,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761045425] [2021-07-09 17:46:34,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761045425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:34,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596824858] [2021-07-09 17:46:34,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:35,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:35,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:35,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:35,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:35,215 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-07-09 17:46:35,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:35,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:35,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:35,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:35,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:35,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:35,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:35,313 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-07-09 17:46:35,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:35,314 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:95, output treesize:61 [2021-07-09 17:46:35,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:35,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:35,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:35,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:35,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:35,387 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:35,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:35,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:35,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:35,393 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:35,450 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.3 percent of original size [2021-07-09 17:46:35,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:35,454 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:35,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:35,457 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:35,499 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-07-09 17:46:35,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:35,500 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:111, output treesize:34 [2021-07-09 17:46:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:35,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596824858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:35,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:35,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-07-09 17:46:35,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676328393] [2021-07-09 17:46:35,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:46:35,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:35,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:46:35,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:46:35,568 INFO L87 Difference]: Start difference. First operand 1358 states and 4554 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:36,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:36,633 INFO L93 Difference]: Finished difference Result 1627 states and 5306 transitions. [2021-07-09 17:46:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 17:46:36,633 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:36,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:36,636 INFO L225 Difference]: With dead ends: 1627 [2021-07-09 17:46:36,636 INFO L226 Difference]: Without dead ends: 1534 [2021-07-09 17:46:36,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 808.3ms TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:46:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-07-09 17:46:36,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1251. [2021-07-09 17:46:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.344) internal successors, (4180), 1250 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4180 transitions. [2021-07-09 17:46:36,653 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4180 transitions. Word has length 24 [2021-07-09 17:46:36,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:36,653 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 4180 transitions. [2021-07-09 17:46:36,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:36,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4180 transitions. [2021-07-09 17:46:36,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:36,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:36,655 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:36,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7318 [2021-07-09 17:46:36,859 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:36,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:36,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1252048260, now seen corresponding path program 344 times [2021-07-09 17:46:36,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:36,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599726829] [2021-07-09 17:46:36,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:36,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:36,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599726829] [2021-07-09 17:46:36,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599726829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:36,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107823042] [2021-07-09 17:46:36,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:37,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:46:37,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:37,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:37,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:37,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107823042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:37,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:37,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:46:37,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71769425] [2021-07-09 17:46:37,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:46:37,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:37,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:46:37,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:46:37,275 INFO L87 Difference]: Start difference. First operand 1251 states and 4180 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:37,473 INFO L93 Difference]: Finished difference Result 1572 states and 5105 transitions. [2021-07-09 17:46:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:46:37,473 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:37,475 INFO L225 Difference]: With dead ends: 1572 [2021-07-09 17:46:37,475 INFO L226 Difference]: Without dead ends: 1509 [2021-07-09 17:46:37,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 312.1ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:46:37,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-07-09 17:46:37,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1251. [2021-07-09 17:46:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.344) internal successors, (4180), 1250 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4180 transitions. [2021-07-09 17:46:37,490 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4180 transitions. Word has length 24 [2021-07-09 17:46:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:37,491 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 4180 transitions. [2021-07-09 17:46:37,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:37,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4180 transitions. [2021-07-09 17:46:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:37,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:37,492 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:37,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7337,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:37,705 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:37,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1133518474, now seen corresponding path program 345 times [2021-07-09 17:46:37,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:37,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908178398] [2021-07-09 17:46:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:37,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:37,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908178398] [2021-07-09 17:46:37,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908178398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:37,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142533790] [2021-07-09 17:46:37,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:37,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:46:37,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:37,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:37,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:38,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142533790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:38,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:38,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:46:38,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921284808] [2021-07-09 17:46:38,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:46:38,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:38,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:46:38,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:46:38,063 INFO L87 Difference]: Start difference. First operand 1251 states and 4180 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:38,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:38,214 INFO L93 Difference]: Finished difference Result 1425 states and 4662 transitions. [2021-07-09 17:46:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:38,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:38,217 INFO L225 Difference]: With dead ends: 1425 [2021-07-09 17:46:38,217 INFO L226 Difference]: Without dead ends: 1342 [2021-07-09 17:46:38,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-07-09 17:46:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1198. [2021-07-09 17:46:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.343358395989975) internal successors, (4002), 1197 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4002 transitions. [2021-07-09 17:46:38,230 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4002 transitions. Word has length 24 [2021-07-09 17:46:38,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:38,230 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4002 transitions. [2021-07-09 17:46:38,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:38,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4002 transitions. [2021-07-09 17:46:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:38,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:38,232 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:38,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7348,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:38,448 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:38,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:38,448 INFO L82 PathProgramCache]: Analyzing trace with hash 581879458, now seen corresponding path program 346 times [2021-07-09 17:46:38,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:38,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076782296] [2021-07-09 17:46:38,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:38,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:38,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076782296] [2021-07-09 17:46:38,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076782296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:38,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856043297] [2021-07-09 17:46:38,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:38,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:46:38,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:38,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:38,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:38,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:38,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:38,707 INFO L628 ElimStorePlain]: treesize reduction 2, result has 87.5 percent of original size [2021-07-09 17:46:38,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:38,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2021-07-09 17:46:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:38,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856043297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:38,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:38,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:46:38,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038807203] [2021-07-09 17:46:38,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:46:38,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:38,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:46:38,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:46:38,856 INFO L87 Difference]: Start difference. First operand 1198 states and 4002 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:39,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:39,013 INFO L93 Difference]: Finished difference Result 1478 states and 4858 transitions. [2021-07-09 17:46:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:39,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:39,015 INFO L225 Difference]: With dead ends: 1478 [2021-07-09 17:46:39,015 INFO L226 Difference]: Without dead ends: 1415 [2021-07-09 17:46:39,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:46:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-07-09 17:46:39,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1173. [2021-07-09 17:46:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.319965870307167) internal successors, (3891), 1172 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3891 transitions. [2021-07-09 17:46:39,029 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3891 transitions. Word has length 24 [2021-07-09 17:46:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:39,029 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3891 transitions. [2021-07-09 17:46:39,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3891 transitions. [2021-07-09 17:46:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:39,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:39,031 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:39,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7360,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:39,247 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:39,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:39,247 INFO L82 PathProgramCache]: Analyzing trace with hash -761852682, now seen corresponding path program 347 times [2021-07-09 17:46:39,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:39,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267273336] [2021-07-09 17:46:39,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:39,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:39,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267273336] [2021-07-09 17:46:39,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267273336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:39,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340992535] [2021-07-09 17:46:39,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:39,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:46:39,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:39,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:39,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:39,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:39,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:39,666 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-07-09 17:46:39,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:39,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:39,720 INFO L628 ElimStorePlain]: treesize reduction 38, result has 59.1 percent of original size [2021-07-09 17:46:39,720 INFO L518 ElimStorePlain]: Eliminatee v_prenex_308 vanished before elimination [2021-07-09 17:46:39,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:39,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:39,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:39,745 INFO L518 ElimStorePlain]: Eliminatee v_prenex_309 vanished before elimination [2021-07-09 17:46:39,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:39,745 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:102, output treesize:52 [2021-07-09 17:46:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:39,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340992535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:39,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:39,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 17:46:39,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566772994] [2021-07-09 17:46:39,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:46:39,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:39,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:46:39,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:46:39,851 INFO L87 Difference]: Start difference. First operand 1173 states and 3891 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:40,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:40,059 INFO L93 Difference]: Finished difference Result 1470 states and 4693 transitions. [2021-07-09 17:46:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:46:40,060 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:40,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:40,062 INFO L225 Difference]: With dead ends: 1470 [2021-07-09 17:46:40,062 INFO L226 Difference]: Without dead ends: 1407 [2021-07-09 17:46:40,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 286.7ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:40,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-07-09 17:46:40,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1130. [2021-07-09 17:46:40,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 3.2719220549158545) internal successors, (3694), 1129 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:40,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 3694 transitions. [2021-07-09 17:46:40,075 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 3694 transitions. Word has length 24 [2021-07-09 17:46:40,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:40,075 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 3694 transitions. [2021-07-09 17:46:40,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:40,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 3694 transitions. [2021-07-09 17:46:40,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:40,077 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:40,077 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:40,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7383,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:40,286 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:40,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:40,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1623714052, now seen corresponding path program 348 times [2021-07-09 17:46:40,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:40,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826232171] [2021-07-09 17:46:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:40,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:40,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826232171] [2021-07-09 17:46:40,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826232171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:40,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266225375] [2021-07-09 17:46:40,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:40,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:46:40,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:40,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:46:40,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:40,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266225375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:40,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:40,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:46:40,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952718520] [2021-07-09 17:46:40,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:46:40,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:40,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:46:40,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:46:40,622 INFO L87 Difference]: Start difference. First operand 1130 states and 3694 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:40,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:40,794 INFO L93 Difference]: Finished difference Result 1323 states and 4250 transitions. [2021-07-09 17:46:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:40,794 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:40,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:40,796 INFO L225 Difference]: With dead ends: 1323 [2021-07-09 17:46:40,796 INFO L226 Difference]: Without dead ends: 1248 [2021-07-09 17:46:40,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:46:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-09 17:46:40,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1088. [2021-07-09 17:46:40,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.2594296228150874) internal successors, (3543), 1087 states have internal predecessors, (3543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3543 transitions. [2021-07-09 17:46:40,808 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3543 transitions. Word has length 24 [2021-07-09 17:46:40,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:40,808 INFO L482 AbstractCegarLoop]: Abstraction has 1088 states and 3543 transitions. [2021-07-09 17:46:40,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:40,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3543 transitions. [2021-07-09 17:46:40,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:40,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:40,809 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:41,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7400 [2021-07-09 17:46:41,026 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:41,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1130511476, now seen corresponding path program 349 times [2021-07-09 17:46:41,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:41,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558968700] [2021-07-09 17:46:41,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:41,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:41,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558968700] [2021-07-09 17:46:41,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558968700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:41,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927302481] [2021-07-09 17:46:41,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:41,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:46:41,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:41,544 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_310, ends_with_6], 1=[ends_with_10]} [2021-07-09 17:46:41,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:46:41,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:41,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:41,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:41,642 INFO L628 ElimStorePlain]: treesize reduction 145, result has 39.3 percent of original size [2021-07-09 17:46:41,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:41,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:41,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:41,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:41,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:41,652 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:41,710 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-07-09 17:46:41,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:41,714 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:41,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:41,717 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:41,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:41,719 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:41,761 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-07-09 17:46:41,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:41,762 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:268, output treesize:24 [2021-07-09 17:46:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:41,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927302481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:41,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:41,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 17:46:41,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841698368] [2021-07-09 17:46:41,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:46:41,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:41,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:46:41,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:46:41,819 INFO L87 Difference]: Start difference. First operand 1088 states and 3543 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:42,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:42,075 INFO L93 Difference]: Finished difference Result 1584 states and 5045 transitions. [2021-07-09 17:46:42,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:46:42,075 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:42,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:42,077 INFO L225 Difference]: With dead ends: 1584 [2021-07-09 17:46:42,077 INFO L226 Difference]: Without dead ends: 1515 [2021-07-09 17:46:42,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:46:42,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-07-09 17:46:42,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1136. [2021-07-09 17:46:42,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.289867841409692) internal successors, (3734), 1135 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3734 transitions. [2021-07-09 17:46:42,091 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3734 transitions. Word has length 24 [2021-07-09 17:46:42,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:42,091 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3734 transitions. [2021-07-09 17:46:42,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:42,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3734 transitions. [2021-07-09 17:46:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:42,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:42,093 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:42,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7412 [2021-07-09 17:46:42,297 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:42,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:42,297 INFO L82 PathProgramCache]: Analyzing trace with hash 54570504, now seen corresponding path program 350 times [2021-07-09 17:46:42,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:42,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459921980] [2021-07-09 17:46:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:42,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:42,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459921980] [2021-07-09 17:46:42,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459921980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:42,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289717615] [2021-07-09 17:46:42,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:42,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:46:42,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:42,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:46:42,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:42,800 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_311, ends_with_6], 1=[ends_with_10]} [2021-07-09 17:46:42,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:46:42,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:42,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:42,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:42,886 INFO L628 ElimStorePlain]: treesize reduction 145, result has 39.3 percent of original size [2021-07-09 17:46:42,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:42,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:42,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:42,891 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:42,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:42,894 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:42,940 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-07-09 17:46:42,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:42,943 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:42,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:42,945 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:42,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:42,947 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:42,981 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-07-09 17:46:42,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:42,992 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:268, output treesize:24 [2021-07-09 17:46:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:43,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289717615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:43,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:43,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:46:43,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71806929] [2021-07-09 17:46:43,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:46:43,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:43,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:46:43,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:46:43,049 INFO L87 Difference]: Start difference. First operand 1136 states and 3734 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:43,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:43,275 INFO L93 Difference]: Finished difference Result 1687 states and 5370 transitions. [2021-07-09 17:46:43,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:46:43,275 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:43,278 INFO L225 Difference]: With dead ends: 1687 [2021-07-09 17:46:43,278 INFO L226 Difference]: Without dead ends: 1635 [2021-07-09 17:46:43,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:46:43,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-07-09 17:46:43,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1134. [2021-07-09 17:46:43,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.2983230361871136) internal successors, (3737), 1133 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3737 transitions. [2021-07-09 17:46:43,293 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3737 transitions. Word has length 24 [2021-07-09 17:46:43,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:43,293 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 3737 transitions. [2021-07-09 17:46:43,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:43,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3737 transitions. [2021-07-09 17:46:43,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:43,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:43,294 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:43,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7506,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:43,509 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:43,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:43,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1814623444, now seen corresponding path program 351 times [2021-07-09 17:46:43,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:43,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242059213] [2021-07-09 17:46:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:43,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:43,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242059213] [2021-07-09 17:46:43,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242059213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:43,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028271079] [2021-07-09 17:46:43,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:43,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:46:43,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:43,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:46:43,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:43,906 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_313, v_prenex_312, ends_with_6], 1=[ends_with_10]} [2021-07-09 17:46:43,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:43,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:43,953 INFO L628 ElimStorePlain]: treesize reduction 94, result has 32.4 percent of original size [2021-07-09 17:46:43,953 INFO L518 ElimStorePlain]: Eliminatee v_prenex_312 vanished before elimination [2021-07-09 17:46:43,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:43,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:43,990 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.6 percent of original size [2021-07-09 17:46:43,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:43,993 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:43,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:43,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:44,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:44,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:44,010 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:142, output treesize:16 [2021-07-09 17:46:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:44,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028271079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:44,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:44,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:46:44,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726489804] [2021-07-09 17:46:44,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:46:44,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:44,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:46:44,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:46:44,055 INFO L87 Difference]: Start difference. First operand 1134 states and 3737 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:44,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:44,298 INFO L93 Difference]: Finished difference Result 1432 states and 4583 transitions. [2021-07-09 17:46:44,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:46:44,298 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:44,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:44,300 INFO L225 Difference]: With dead ends: 1432 [2021-07-09 17:46:44,301 INFO L226 Difference]: Without dead ends: 1380 [2021-07-09 17:46:44,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 297.9ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:46:44,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-07-09 17:46:44,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1094. [2021-07-09 17:46:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.262580054894785) internal successors, (3566), 1093 states have internal predecessors, (3566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:44,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3566 transitions. [2021-07-09 17:46:44,314 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3566 transitions. Word has length 24 [2021-07-09 17:46:44,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:44,314 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 3566 transitions. [2021-07-09 17:46:44,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:44,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3566 transitions. [2021-07-09 17:46:44,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:44,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:44,315 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:44,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7601,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:44,531 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:44,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:44,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1658558706, now seen corresponding path program 352 times [2021-07-09 17:46:44,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:44,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314515110] [2021-07-09 17:46:44,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:46:44,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:44,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314515110] [2021-07-09 17:46:44,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314515110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:44,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558812575] [2021-07-09 17:46:44,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:44,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:46:44,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:44,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:46:44,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:44,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:44,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:44,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:44,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:44,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:44,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:44,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:44,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:44,906 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-07-09 17:46:44,906 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-07-09 17:46:44,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:46:44,908 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:59 [2021-07-09 17:46:44,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:44,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:44,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:46:44,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:44,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:44,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:45,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:45,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:45,006 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:11 [2021-07-09 17:46:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:45,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558812575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:45,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:45,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:46:45,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479388971] [2021-07-09 17:46:45,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:46:45,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:45,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:46:45,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:46:45,040 INFO L87 Difference]: Start difference. First operand 1094 states and 3566 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:46,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:46,509 INFO L93 Difference]: Finished difference Result 1761 states and 5439 transitions. [2021-07-09 17:46:46,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:46:46,510 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:46,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:46,512 INFO L225 Difference]: With dead ends: 1761 [2021-07-09 17:46:46,512 INFO L226 Difference]: Without dead ends: 1531 [2021-07-09 17:46:46,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1123.4ms TimeCoverageRelationStatistics Valid=225, Invalid=1497, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:46:46,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-07-09 17:46:46,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1136. [2021-07-09 17:46:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2731277533039647) internal successors, (3715), 1135 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3715 transitions. [2021-07-09 17:46:46,526 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3715 transitions. Word has length 24 [2021-07-09 17:46:46,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:46,526 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3715 transitions. [2021-07-09 17:46:46,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:46,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3715 transitions. [2021-07-09 17:46:46,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:46,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:46,528 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:46,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7627,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:46,744 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:46,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:46,745 INFO L82 PathProgramCache]: Analyzing trace with hash -98423810, now seen corresponding path program 353 times [2021-07-09 17:46:46,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:46,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806002498] [2021-07-09 17:46:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:46,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:46,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806002498] [2021-07-09 17:46:46,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806002498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:46,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624457633] [2021-07-09 17:46:46,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:47,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:46:47,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:47,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:46:47,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:47,291 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_316], 1=[ends_with_10]} [2021-07-09 17:46:47,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:47,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:47,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:47,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:47,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:47,301 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:47,303 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:46:47,304 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:47,349 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.3 percent of original size [2021-07-09 17:46:47,349 INFO L518 ElimStorePlain]: Eliminatee v_prenex_316 vanished before elimination [2021-07-09 17:46:47,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:47,352 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:47,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:47,354 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:47,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:47,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:46:47,372 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:172, output treesize:16 [2021-07-09 17:46:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:47,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624457633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:47,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:47,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-09 17:46:47,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086283067] [2021-07-09 17:46:47,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:47,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:47,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:47,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:47,409 INFO L87 Difference]: Start difference. First operand 1136 states and 3715 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:47,842 INFO L93 Difference]: Finished difference Result 1472 states and 4723 transitions. [2021-07-09 17:46:47,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:46:47,843 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:47,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:47,845 INFO L225 Difference]: With dead ends: 1472 [2021-07-09 17:46:47,845 INFO L226 Difference]: Without dead ends: 1420 [2021-07-09 17:46:47,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 481.3ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:46:47,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-07-09 17:46:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1136. [2021-07-09 17:46:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2731277533039647) internal successors, (3715), 1135 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3715 transitions. [2021-07-09 17:46:47,858 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3715 transitions. Word has length 24 [2021-07-09 17:46:47,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:47,858 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3715 transitions. [2021-07-09 17:46:47,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3715 transitions. [2021-07-09 17:46:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:47,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:47,860 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:48,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7646,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:48,061 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:48,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:48,061 INFO L82 PathProgramCache]: Analyzing trace with hash -320984176, now seen corresponding path program 354 times [2021-07-09 17:46:48,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:48,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634426014] [2021-07-09 17:46:48,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:48,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:48,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634426014] [2021-07-09 17:46:48,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634426014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:48,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713524000] [2021-07-09 17:46:48,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:48,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:46:48,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:48,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:46:48,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:48,631 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_317, v_prenex_318], 1=[ends_with_10]} [2021-07-09 17:46:48,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:48,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:48,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:48,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:48,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:48,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:48,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:46:48,646 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:48,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:48,650 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:48,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:48,654 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:48,785 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-07-09 17:46:48,785 INFO L628 ElimStorePlain]: treesize reduction 180, result has 39.6 percent of original size [2021-07-09 17:46:48,785 INFO L518 ElimStorePlain]: Eliminatee v_prenex_317 vanished before elimination [2021-07-09 17:46:48,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:48,789 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:48,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:48,793 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:48,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:48,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:48,853 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:48,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:48,856 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:48,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:48,859 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:48,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:48,863 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:48,940 INFO L628 ElimStorePlain]: treesize reduction 20, result has 79.4 percent of original size [2021-07-09 17:46:48,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:46:48,942 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:353, output treesize:31 [2021-07-09 17:46:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:49,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713524000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:49,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:49,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-09 17:46:49,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800619092] [2021-07-09 17:46:49,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:49,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:49,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:49,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:49,027 INFO L87 Difference]: Start difference. First operand 1136 states and 3715 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:49,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:49,612 INFO L93 Difference]: Finished difference Result 1574 states and 5014 transitions. [2021-07-09 17:46:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:46:49,612 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:49,615 INFO L225 Difference]: With dead ends: 1574 [2021-07-09 17:46:49,615 INFO L226 Difference]: Without dead ends: 1505 [2021-07-09 17:46:49,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 580.9ms TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:46:49,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-07-09 17:46:49,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1163. [2021-07-09 17:46:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 3.2900172117039586) internal successors, (3823), 1162 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:49,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 3823 transitions. [2021-07-09 17:46:49,629 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 3823 transitions. Word has length 24 [2021-07-09 17:46:49,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:49,630 INFO L482 AbstractCegarLoop]: Abstraction has 1163 states and 3823 transitions. [2021-07-09 17:46:49,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:49,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 3823 transitions. [2021-07-09 17:46:49,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:49,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:49,631 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:49,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7695 [2021-07-09 17:46:49,845 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:49,845 INFO L82 PathProgramCache]: Analyzing trace with hash 825622932, now seen corresponding path program 355 times [2021-07-09 17:46:49,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:49,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484379053] [2021-07-09 17:46:49,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:49,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:49,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484379053] [2021-07-09 17:46:49,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484379053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:49,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955363365] [2021-07-09 17:46:49,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:50,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:46:50,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:50,383 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_319], 1=[ends_with_10]} [2021-07-09 17:46:50,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:46:50,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:50,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:50,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:50,514 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-07-09 17:46:50,514 INFO L628 ElimStorePlain]: treesize reduction 112, result has 57.4 percent of original size [2021-07-09 17:46:50,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:50,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:50,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:50,521 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:50,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:50,524 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:50,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:50,527 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:50,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:50,530 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:50,640 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-07-09 17:46:50,640 INFO L628 ElimStorePlain]: treesize reduction 21, result has 84.2 percent of original size [2021-07-09 17:46:50,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:50,644 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:50,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:50,648 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:50,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:50,652 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:50,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:50,655 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:50,734 INFO L628 ElimStorePlain]: treesize reduction 20, result has 79.4 percent of original size [2021-07-09 17:46:50,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:46:50,736 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:298, output treesize:31 [2021-07-09 17:46:50,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:50,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955363365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:50,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:50,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-09 17:46:50,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452046268] [2021-07-09 17:46:50,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:46:50,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:50,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:46:50,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:46:50,825 INFO L87 Difference]: Start difference. First operand 1163 states and 3823 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:51,439 INFO L93 Difference]: Finished difference Result 1612 states and 5118 transitions. [2021-07-09 17:46:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:46:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:51,442 INFO L225 Difference]: With dead ends: 1612 [2021-07-09 17:46:51,442 INFO L226 Difference]: Without dead ends: 1560 [2021-07-09 17:46:51,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 620.6ms TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:46:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-07-09 17:46:51,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1137. [2021-07-09 17:46:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.273767605633803) internal successors, (3719), 1136 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3719 transitions. [2021-07-09 17:46:51,456 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3719 transitions. Word has length 24 [2021-07-09 17:46:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:51,456 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 3719 transitions. [2021-07-09 17:46:51,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:51,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3719 transitions. [2021-07-09 17:46:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:51,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:51,458 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:51,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7759 [2021-07-09 17:46:51,664 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:51,664 INFO L82 PathProgramCache]: Analyzing trace with hash 252674682, now seen corresponding path program 356 times [2021-07-09 17:46:51,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:51,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751488624] [2021-07-09 17:46:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:51,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:51,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751488624] [2021-07-09 17:46:51,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751488624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:51,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305835491] [2021-07-09 17:46:51,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:51,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:46:51,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:51,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:46:51,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:51,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:51,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:51,994 INFO L628 ElimStorePlain]: treesize reduction 29, result has 71.8 percent of original size [2021-07-09 17:46:51,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:51,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:52,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:52,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:52,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:52,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:52,050 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-07-09 17:46:52,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:46:52,051 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:107, output treesize:59 [2021-07-09 17:46:52,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:52,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:52,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:52,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:46:52,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:52,145 INFO L628 ElimStorePlain]: treesize reduction 23, result has 67.6 percent of original size [2021-07-09 17:46:52,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:52,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:52,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:52,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:52,163 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:26 [2021-07-09 17:46:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:46:52,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305835491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:52,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:52,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:46:52,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127401872] [2021-07-09 17:46:52,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:46:52,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:52,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:46:52,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:46:52,233 INFO L87 Difference]: Start difference. First operand 1137 states and 3719 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:53,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:53,458 INFO L93 Difference]: Finished difference Result 1825 states and 5709 transitions. [2021-07-09 17:46:53,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:46:53,458 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:53,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:53,461 INFO L225 Difference]: With dead ends: 1825 [2021-07-09 17:46:53,461 INFO L226 Difference]: Without dead ends: 1684 [2021-07-09 17:46:53,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 929.1ms TimeCoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:46:53,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-07-09 17:46:53,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1146. [2021-07-09 17:46:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.2995633187772926) internal successors, (3778), 1145 states have internal predecessors, (3778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:53,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3778 transitions. [2021-07-09 17:46:53,476 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3778 transitions. Word has length 24 [2021-07-09 17:46:53,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:53,476 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 3778 transitions. [2021-07-09 17:46:53,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:53,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3778 transitions. [2021-07-09 17:46:53,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:46:53,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:53,477 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:53,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7829 [2021-07-09 17:46:53,693 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:53,693 INFO L82 PathProgramCache]: Analyzing trace with hash -591717378, now seen corresponding path program 357 times [2021-07-09 17:46:53,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:53,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656054070] [2021-07-09 17:46:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:46:53,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:53,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656054070] [2021-07-09 17:46:53,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656054070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:53,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583681936] [2021-07-09 17:46:53,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:53,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:46:53,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:53,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:46:53,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:54,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:54,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:54,098 INFO L628 ElimStorePlain]: treesize reduction 58, result has 64.2 percent of original size [2021-07-09 17:46:54,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:54,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:54,191 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-07-09 17:46:54,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:54,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:54,262 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.3 percent of original size [2021-07-09 17:46:54,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:54,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:54,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:54,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:46:54,299 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:165, output treesize:59 [2021-07-09 17:46:54,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:46:54,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:54,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:46:54,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:46:54,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:54,418 INFO L628 ElimStorePlain]: treesize reduction 40, result has 54.0 percent of original size [2021-07-09 17:46:54,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:46:54,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:46:54,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:46:54,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:46:54,440 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:26 [2021-07-09 17:46:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:54,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583681936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:54,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:54,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 17:46:54,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085128798] [2021-07-09 17:46:54,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:46:54,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:54,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:46:54,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:46:54,525 INFO L87 Difference]: Start difference. First operand 1146 states and 3778 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:56,014 INFO L93 Difference]: Finished difference Result 1665 states and 5212 transitions. [2021-07-09 17:46:56,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:46:56,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:46:56,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:56,017 INFO L225 Difference]: With dead ends: 1665 [2021-07-09 17:46:56,017 INFO L226 Difference]: Without dead ends: 1518 [2021-07-09 17:46:56,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1073.1ms TimeCoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:46:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-07-09 17:46:56,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1069. [2021-07-09 17:46:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.25) internal successors, (3471), 1068 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3471 transitions. [2021-07-09 17:46:56,032 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3471 transitions. Word has length 24 [2021-07-09 17:46:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:56,032 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 3471 transitions. [2021-07-09 17:46:56,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3471 transitions. [2021-07-09 17:46:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:46:56,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:56,033 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:46:56,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7847 [2021-07-09 17:46:56,246 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:46:56,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:46:56,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1468889190, now seen corresponding path program 358 times [2021-07-09 17:46:56,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:46:56,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620907185] [2021-07-09 17:46:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:46:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:46:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:56,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:46:56,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620907185] [2021-07-09 17:46:56,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620907185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:56,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696988089] [2021-07-09 17:46:56,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:46:56,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:46:56,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:46:56,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:46:56,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:46:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:46:56,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696988089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:46:56,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:46:56,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:46:56,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611847202] [2021-07-09 17:46:56,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:46:56,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:46:56,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:46:56,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:46:56,706 INFO L87 Difference]: Start difference. First operand 1069 states and 3471 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:59,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:46:59,774 INFO L93 Difference]: Finished difference Result 2034 states and 6206 transitions. [2021-07-09 17:46:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-09 17:46:59,774 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:46:59,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:46:59,777 INFO L225 Difference]: With dead ends: 2034 [2021-07-09 17:46:59,777 INFO L226 Difference]: Without dead ends: 1956 [2021-07-09 17:46:59,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3037 ImplicationChecksByTransitivity, 1892.2ms TimeCoverageRelationStatistics Valid=782, Invalid=8148, Unknown=0, NotChecked=0, Total=8930 [2021-07-09 17:46:59,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-07-09 17:46:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1101. [2021-07-09 17:46:59,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2636363636363637) internal successors, (3590), 1100 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3590 transitions. [2021-07-09 17:46:59,794 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3590 transitions. Word has length 25 [2021-07-09 17:46:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:46:59,794 INFO L482 AbstractCegarLoop]: Abstraction has 1101 states and 3590 transitions. [2021-07-09 17:46:59,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:46:59,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3590 transitions. [2021-07-09 17:46:59,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:46:59,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:46:59,796 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:00,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7875,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:00,012 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:00,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:00,012 INFO L82 PathProgramCache]: Analyzing trace with hash 195955482, now seen corresponding path program 359 times [2021-07-09 17:47:00,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:00,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865208374] [2021-07-09 17:47:00,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:00,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:00,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865208374] [2021-07-09 17:47:00,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865208374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:00,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903964971] [2021-07-09 17:47:00,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:00,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:47:00,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:00,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:00,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:00,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903964971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:00,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:00,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:00,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015018245] [2021-07-09 17:47:00,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:00,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:00,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:00,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:00,663 INFO L87 Difference]: Start difference. First operand 1101 states and 3590 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:02,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:02,624 INFO L93 Difference]: Finished difference Result 1986 states and 6129 transitions. [2021-07-09 17:47:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 17:47:02,625 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:02,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:02,628 INFO L225 Difference]: With dead ends: 1986 [2021-07-09 17:47:02,628 INFO L226 Difference]: Without dead ends: 1908 [2021-07-09 17:47:02,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 1143.9ms TimeCoverageRelationStatistics Valid=457, Invalid=4945, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 17:47:02,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-07-09 17:47:02,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1096. [2021-07-09 17:47:02,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.2831050228310503) internal successors, (3595), 1095 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3595 transitions. [2021-07-09 17:47:02,646 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3595 transitions. Word has length 25 [2021-07-09 17:47:02,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:02,646 INFO L482 AbstractCegarLoop]: Abstraction has 1096 states and 3595 transitions. [2021-07-09 17:47:02,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:02,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3595 transitions. [2021-07-09 17:47:02,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:02,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:02,648 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:02,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7884 [2021-07-09 17:47:02,864 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:02,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:02,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1381037462, now seen corresponding path program 360 times [2021-07-09 17:47:02,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:02,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357432698] [2021-07-09 17:47:02,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:02,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:02,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357432698] [2021-07-09 17:47:02,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357432698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:02,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248997924] [2021-07-09 17:47:02,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:03,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:47:03,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:03,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:03,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:03,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248997924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:03,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:03,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:03,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581212161] [2021-07-09 17:47:03,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:03,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:03,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:03,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:03,443 INFO L87 Difference]: Start difference. First operand 1096 states and 3595 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:05,601 INFO L93 Difference]: Finished difference Result 2064 states and 6370 transitions. [2021-07-09 17:47:05,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 17:47:05,601 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:05,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:05,604 INFO L225 Difference]: With dead ends: 2064 [2021-07-09 17:47:05,604 INFO L226 Difference]: Without dead ends: 2012 [2021-07-09 17:47:05,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 1228.5ms TimeCoverageRelationStatistics Valid=593, Invalid=5259, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 17:47:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-07-09 17:47:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1064. [2021-07-09 17:47:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.3029162746942617) internal successors, (3511), 1063 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:05,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3511 transitions. [2021-07-09 17:47:05,621 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3511 transitions. Word has length 25 [2021-07-09 17:47:05,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:05,621 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3511 transitions. [2021-07-09 17:47:05,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:05,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3511 transitions. [2021-07-09 17:47:05,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:05,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:05,623 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:05,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7982 [2021-07-09 17:47:05,839 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:05,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:05,839 INFO L82 PathProgramCache]: Analyzing trace with hash 496440448, now seen corresponding path program 361 times [2021-07-09 17:47:05,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:05,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847313909] [2021-07-09 17:47:05,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:05,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:05,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847313909] [2021-07-09 17:47:05,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847313909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:05,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139174017] [2021-07-09 17:47:05,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:06,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:06,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:06,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139174017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:06,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:06,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:06,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747616096] [2021-07-09 17:47:06,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:06,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:06,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:06,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:06,270 INFO L87 Difference]: Start difference. First operand 1064 states and 3511 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:07,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:07,579 INFO L93 Difference]: Finished difference Result 1617 states and 5059 transitions. [2021-07-09 17:47:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 17:47:07,580 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:07,582 INFO L225 Difference]: With dead ends: 1617 [2021-07-09 17:47:07,582 INFO L226 Difference]: Without dead ends: 1468 [2021-07-09 17:47:07,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 810.7ms TimeCoverageRelationStatistics Valid=331, Invalid=3451, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 17:47:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-07-09 17:47:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1074. [2021-07-09 17:47:07,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.302889095992544) internal successors, (3544), 1073 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:07,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3544 transitions. [2021-07-09 17:47:07,597 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3544 transitions. Word has length 25 [2021-07-09 17:47:07,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:07,597 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 3544 transitions. [2021-07-09 17:47:07,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:07,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3544 transitions. [2021-07-09 17:47:07,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:07,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:07,598 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:07,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8017 [2021-07-09 17:47:07,815 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:07,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:07,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1193889788, now seen corresponding path program 362 times [2021-07-09 17:47:07,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:07,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101425639] [2021-07-09 17:47:07,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:07,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:07,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101425639] [2021-07-09 17:47:07,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101425639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:07,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642307105] [2021-07-09 17:47:07,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:08,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:08,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:08,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:08,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:08,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642307105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:08,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:08,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:08,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429074466] [2021-07-09 17:47:08,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:08,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:08,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:08,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:08,270 INFO L87 Difference]: Start difference. First operand 1074 states and 3544 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:09,837 INFO L93 Difference]: Finished difference Result 1700 states and 5327 transitions. [2021-07-09 17:47:09,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 17:47:09,838 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:09,840 INFO L225 Difference]: With dead ends: 1700 [2021-07-09 17:47:09,840 INFO L226 Difference]: Without dead ends: 1579 [2021-07-09 17:47:09,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 1089.2ms TimeCoverageRelationStatistics Valid=409, Invalid=4283, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 17:47:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-07-09 17:47:09,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1087. [2021-07-09 17:47:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.303867403314917) internal successors, (3588), 1086 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3588 transitions. [2021-07-09 17:47:09,854 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3588 transitions. Word has length 25 [2021-07-09 17:47:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:09,854 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 3588 transitions. [2021-07-09 17:47:09,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:09,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3588 transitions. [2021-07-09 17:47:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:09,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:09,856 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:10,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8029 [2021-07-09 17:47:10,069 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:10,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:10,069 INFO L82 PathProgramCache]: Analyzing trace with hash -723274496, now seen corresponding path program 363 times [2021-07-09 17:47:10,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:10,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924863453] [2021-07-09 17:47:10,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:10,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:10,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924863453] [2021-07-09 17:47:10,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924863453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:10,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213445055] [2021-07-09 17:47:10,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:10,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:47:10,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:10,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:10,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:10,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213445055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:10,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:10,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:10,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974564384] [2021-07-09 17:47:10,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:10,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:10,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:10,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:10,486 INFO L87 Difference]: Start difference. First operand 1087 states and 3588 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:12,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:12,503 INFO L93 Difference]: Finished difference Result 1756 states and 5467 transitions. [2021-07-09 17:47:12,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 17:47:12,503 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:12,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:12,506 INFO L225 Difference]: With dead ends: 1756 [2021-07-09 17:47:12,506 INFO L226 Difference]: Without dead ends: 1678 [2021-07-09 17:47:12,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1425.9ms TimeCoverageRelationStatistics Valid=641, Invalid=5365, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 17:47:12,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-07-09 17:47:12,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1088. [2021-07-09 17:47:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.3045078196872124) internal successors, (3592), 1087 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3592 transitions. [2021-07-09 17:47:12,522 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3592 transitions. Word has length 25 [2021-07-09 17:47:12,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:12,522 INFO L482 AbstractCegarLoop]: Abstraction has 1088 states and 3592 transitions. [2021-07-09 17:47:12,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3592 transitions. [2021-07-09 17:47:12,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:12,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:12,523 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:12,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8047 [2021-07-09 17:47:12,737 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:12,737 INFO L82 PathProgramCache]: Analyzing trace with hash 461807484, now seen corresponding path program 364 times [2021-07-09 17:47:12,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:12,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861090027] [2021-07-09 17:47:12,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:12,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:12,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861090027] [2021-07-09 17:47:12,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861090027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:12,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466831415] [2021-07-09 17:47:12,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:12,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:12,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:12,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:12,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:13,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466831415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:13,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:13,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:13,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225626408] [2021-07-09 17:47:13,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:13,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:13,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:13,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:13,227 INFO L87 Difference]: Start difference. First operand 1088 states and 3592 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:14,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:14,538 INFO L93 Difference]: Finished difference Result 1606 states and 5071 transitions. [2021-07-09 17:47:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 17:47:14,538 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:14,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:14,540 INFO L225 Difference]: With dead ends: 1606 [2021-07-09 17:47:14,541 INFO L226 Difference]: Without dead ends: 1554 [2021-07-09 17:47:14,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1010.3ms TimeCoverageRelationStatistics Valid=500, Invalid=3406, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 17:47:14,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-07-09 17:47:14,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1064. [2021-07-09 17:47:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.303857008466604) internal successors, (3512), 1063 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3512 transitions. [2021-07-09 17:47:14,555 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3512 transitions. Word has length 25 [2021-07-09 17:47:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:14,555 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3512 transitions. [2021-07-09 17:47:14,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3512 transitions. [2021-07-09 17:47:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:14,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:14,557 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:14,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8060,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:14,774 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:14,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:14,774 INFO L82 PathProgramCache]: Analyzing trace with hash 387650504, now seen corresponding path program 365 times [2021-07-09 17:47:14,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:14,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030136860] [2021-07-09 17:47:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:14,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:14,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030136860] [2021-07-09 17:47:14,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030136860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:14,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480605300] [2021-07-09 17:47:14,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:14,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:47:14,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:14,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:15,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480605300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:15,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:15,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:15,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872275567] [2021-07-09 17:47:15,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:15,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:15,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:15,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:15,208 INFO L87 Difference]: Start difference. First operand 1064 states and 3512 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:16,612 INFO L93 Difference]: Finished difference Result 1593 states and 4983 transitions. [2021-07-09 17:47:16,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 17:47:16,613 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:16,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:16,615 INFO L225 Difference]: With dead ends: 1593 [2021-07-09 17:47:16,615 INFO L226 Difference]: Without dead ends: 1472 [2021-07-09 17:47:16,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 870.9ms TimeCoverageRelationStatistics Valid=354, Invalid=3552, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 17:47:16,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-07-09 17:47:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1064. [2021-07-09 17:47:16,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.2925682031984946) internal successors, (3500), 1063 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3500 transitions. [2021-07-09 17:47:16,629 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3500 transitions. Word has length 25 [2021-07-09 17:47:16,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:16,629 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3500 transitions. [2021-07-09 17:47:16,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:16,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3500 transitions. [2021-07-09 17:47:16,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:16,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:16,631 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:16,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8079,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:16,847 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:16,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:16,848 INFO L82 PathProgramCache]: Analyzing trace with hash -344431800, now seen corresponding path program 366 times [2021-07-09 17:47:16,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:16,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120403714] [2021-07-09 17:47:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:16,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:16,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120403714] [2021-07-09 17:47:16,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120403714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:16,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426958734] [2021-07-09 17:47:16,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:17,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:47:17,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:17,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 17:47:17,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:17,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426958734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:17,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:17,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:17,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777506653] [2021-07-09 17:47:17,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:17,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:17,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:17,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:17,350 INFO L87 Difference]: Start difference. First operand 1064 states and 3500 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:18,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:18,714 INFO L93 Difference]: Finished difference Result 1555 states and 4863 transitions. [2021-07-09 17:47:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 17:47:18,714 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:18,717 INFO L225 Difference]: With dead ends: 1555 [2021-07-09 17:47:18,717 INFO L226 Difference]: Without dead ends: 1503 [2021-07-09 17:47:18,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1032.0ms TimeCoverageRelationStatistics Valid=496, Invalid=3536, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 17:47:18,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2021-07-09 17:47:18,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1025. [2021-07-09 17:47:18,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 3.265625) internal successors, (3344), 1024 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:18,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3344 transitions. [2021-07-09 17:47:18,732 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3344 transitions. Word has length 25 [2021-07-09 17:47:18,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:18,732 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 3344 transitions. [2021-07-09 17:47:18,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:18,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3344 transitions. [2021-07-09 17:47:18,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:18,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:18,735 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:18,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8092,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:18,949 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:18,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:18,955 INFO L82 PathProgramCache]: Analyzing trace with hash 142687432, now seen corresponding path program 367 times [2021-07-09 17:47:18,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:18,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422794876] [2021-07-09 17:47:18,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:19,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:19,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422794876] [2021-07-09 17:47:19,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422794876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:19,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610060000] [2021-07-09 17:47:19,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:19,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:19,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:19,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610060000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:19,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:19,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:19,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276992348] [2021-07-09 17:47:19,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:19,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:19,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:19,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:19,414 INFO L87 Difference]: Start difference. First operand 1025 states and 3344 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:20,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:20,879 INFO L93 Difference]: Finished difference Result 1634 states and 5077 transitions. [2021-07-09 17:47:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 17:47:20,880 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:20,883 INFO L225 Difference]: With dead ends: 1634 [2021-07-09 17:47:20,883 INFO L226 Difference]: Without dead ends: 1582 [2021-07-09 17:47:20,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 976.0ms TimeCoverageRelationStatistics Valid=488, Invalid=4068, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 17:47:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-07-09 17:47:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 928. [2021-07-09 17:47:20,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.236245954692557) internal successors, (3000), 927 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:20,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3000 transitions. [2021-07-09 17:47:20,905 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3000 transitions. Word has length 25 [2021-07-09 17:47:20,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:20,905 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3000 transitions. [2021-07-09 17:47:20,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3000 transitions. [2021-07-09 17:47:20,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:20,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:20,906 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:21,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8109,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:21,123 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:21,123 INFO L82 PathProgramCache]: Analyzing trace with hash -720949964, now seen corresponding path program 368 times [2021-07-09 17:47:21,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:21,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842354765] [2021-07-09 17:47:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:21,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:21,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842354765] [2021-07-09 17:47:21,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842354765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:21,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160833416] [2021-07-09 17:47:21,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:21,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:21,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:21,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:21,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:21,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160833416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:21,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:21,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:21,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922719436] [2021-07-09 17:47:21,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:21,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:21,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:21,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:21,538 INFO L87 Difference]: Start difference. First operand 928 states and 3000 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:22,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:22,885 INFO L93 Difference]: Finished difference Result 1353 states and 4151 transitions. [2021-07-09 17:47:22,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:47:22,886 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:22,888 INFO L225 Difference]: With dead ends: 1353 [2021-07-09 17:47:22,888 INFO L226 Difference]: Without dead ends: 1204 [2021-07-09 17:47:22,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 747.6ms TimeCoverageRelationStatistics Valid=344, Invalid=2962, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 17:47:22,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-07-09 17:47:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 934. [2021-07-09 17:47:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.2293676312968915) internal successors, (3013), 933 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3013 transitions. [2021-07-09 17:47:22,900 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3013 transitions. Word has length 25 [2021-07-09 17:47:22,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:22,900 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 3013 transitions. [2021-07-09 17:47:22,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3013 transitions. [2021-07-09 17:47:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:22,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:22,901 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:23,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8115 [2021-07-09 17:47:23,117 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:23,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:23,117 INFO L82 PathProgramCache]: Analyzing trace with hash -23500624, now seen corresponding path program 369 times [2021-07-09 17:47:23,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:23,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412640826] [2021-07-09 17:47:23,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:23,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:23,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412640826] [2021-07-09 17:47:23,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412640826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:23,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194671649] [2021-07-09 17:47:23,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:23,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:47:23,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:23,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:23,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:23,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194671649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:23,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:23,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:23,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416695780] [2021-07-09 17:47:23,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:23,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:23,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:23,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:23,569 INFO L87 Difference]: Start difference. First operand 934 states and 3013 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:25,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:25,156 INFO L93 Difference]: Finished difference Result 1438 states and 4422 transitions. [2021-07-09 17:47:25,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:47:25,156 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:25,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:25,158 INFO L225 Difference]: With dead ends: 1438 [2021-07-09 17:47:25,158 INFO L226 Difference]: Without dead ends: 1317 [2021-07-09 17:47:25,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1046.6ms TimeCoverageRelationStatistics Valid=363, Invalid=3177, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:47:25,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-07-09 17:47:25,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 945. [2021-07-09 17:47:25,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 3.2288135593220337) internal successors, (3048), 944 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:25,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 3048 transitions. [2021-07-09 17:47:25,170 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 3048 transitions. Word has length 25 [2021-07-09 17:47:25,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:25,171 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 3048 transitions. [2021-07-09 17:47:25,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:25,171 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 3048 transitions. [2021-07-09 17:47:25,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:25,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:25,172 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:25,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8131 [2021-07-09 17:47:25,387 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:25,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:25,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1940664908, now seen corresponding path program 370 times [2021-07-09 17:47:25,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:25,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429526785] [2021-07-09 17:47:25,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:25,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:25,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429526785] [2021-07-09 17:47:25,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429526785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:25,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663730332] [2021-07-09 17:47:25,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:25,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:25,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:25,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:25,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:25,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663730332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:25,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:25,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:25,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534723525] [2021-07-09 17:47:25,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:25,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:25,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:25,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:25,846 INFO L87 Difference]: Start difference. First operand 945 states and 3048 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:28,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:28,047 INFO L93 Difference]: Finished difference Result 1649 states and 5064 transitions. [2021-07-09 17:47:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 17:47:28,047 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:28,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:28,050 INFO L225 Difference]: With dead ends: 1649 [2021-07-09 17:47:28,050 INFO L226 Difference]: Without dead ends: 1571 [2021-07-09 17:47:28,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 1600.0ms TimeCoverageRelationStatistics Valid=658, Invalid=5348, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 17:47:28,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2021-07-09 17:47:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 988. [2021-07-09 17:47:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 3.243161094224924) internal successors, (3201), 987 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 3201 transitions. [2021-07-09 17:47:28,065 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 3201 transitions. Word has length 25 [2021-07-09 17:47:28,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:28,065 INFO L482 AbstractCegarLoop]: Abstraction has 988 states and 3201 transitions. [2021-07-09 17:47:28,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:28,065 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 3201 transitions. [2021-07-09 17:47:28,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:28,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:28,067 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:28,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8139,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:28,283 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:28,292 INFO L82 PathProgramCache]: Analyzing trace with hash -755582928, now seen corresponding path program 371 times [2021-07-09 17:47:28,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:28,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768038874] [2021-07-09 17:47:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:28,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:28,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768038874] [2021-07-09 17:47:28,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768038874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:28,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404398537] [2021-07-09 17:47:28,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:28,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:47:28,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:28,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:28,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:28,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404398537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:28,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:28,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:28,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513508915] [2021-07-09 17:47:28,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:28,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:28,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:28,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:28,839 INFO L87 Difference]: Start difference. First operand 988 states and 3201 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:30,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:30,382 INFO L93 Difference]: Finished difference Result 1507 states and 4689 transitions. [2021-07-09 17:47:30,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 17:47:30,382 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:30,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:30,384 INFO L225 Difference]: With dead ends: 1507 [2021-07-09 17:47:30,385 INFO L226 Difference]: Without dead ends: 1455 [2021-07-09 17:47:30,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 1105.0ms TimeCoverageRelationStatistics Valid=559, Invalid=3997, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 17:47:30,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-07-09 17:47:30,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 920. [2021-07-09 17:47:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.2241566920565834) internal successors, (2963), 919 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2963 transitions. [2021-07-09 17:47:30,398 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2963 transitions. Word has length 25 [2021-07-09 17:47:30,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:30,398 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2963 transitions. [2021-07-09 17:47:30,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:30,398 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2963 transitions. [2021-07-09 17:47:30,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:30,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:30,399 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:30,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8152 [2021-07-09 17:47:30,615 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:30,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:30,615 INFO L82 PathProgramCache]: Analyzing trace with hash -829739908, now seen corresponding path program 372 times [2021-07-09 17:47:30,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:30,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554563737] [2021-07-09 17:47:30,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:30,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:30,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554563737] [2021-07-09 17:47:30,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554563737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:30,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115789026] [2021-07-09 17:47:30,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:30,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:47:30,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:30,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:30,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:31,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115789026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:31,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:31,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:31,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099087367] [2021-07-09 17:47:31,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:31,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:31,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:31,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:31,049 INFO L87 Difference]: Start difference. First operand 920 states and 2963 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:32,189 INFO L93 Difference]: Finished difference Result 1457 states and 4481 transitions. [2021-07-09 17:47:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:47:32,189 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:32,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:32,192 INFO L225 Difference]: With dead ends: 1457 [2021-07-09 17:47:32,192 INFO L226 Difference]: Without dead ends: 1336 [2021-07-09 17:47:32,192 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 761.7ms TimeCoverageRelationStatistics Valid=349, Invalid=3073, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 17:47:32,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2021-07-09 17:47:32,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 947. [2021-07-09 17:47:32,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.2283298097251585) internal successors, (3054), 946 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:32,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3054 transitions. [2021-07-09 17:47:32,204 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3054 transitions. Word has length 25 [2021-07-09 17:47:32,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:32,204 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3054 transitions. [2021-07-09 17:47:32,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:32,204 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3054 transitions. [2021-07-09 17:47:32,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:32,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:32,205 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:32,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8169 [2021-07-09 17:47:32,421 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:32,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:32,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1548063104, now seen corresponding path program 373 times [2021-07-09 17:47:32,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:32,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301886428] [2021-07-09 17:47:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:32,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:32,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301886428] [2021-07-09 17:47:32,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301886428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:32,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748300051] [2021-07-09 17:47:32,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:32,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:32,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:32,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748300051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:32,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:32,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:32,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875139417] [2021-07-09 17:47:32,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:32,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:32,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:32,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:32,883 INFO L87 Difference]: Start difference. First operand 947 states and 3054 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:35,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:35,157 INFO L93 Difference]: Finished difference Result 1637 states and 5024 transitions. [2021-07-09 17:47:35,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 17:47:35,157 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:35,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:35,160 INFO L225 Difference]: With dead ends: 1637 [2021-07-09 17:47:35,160 INFO L226 Difference]: Without dead ends: 1559 [2021-07-09 17:47:35,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 1589.7ms TimeCoverageRelationStatistics Valid=674, Invalid=5488, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 17:47:35,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-07-09 17:47:35,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 991. [2021-07-09 17:47:35,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.2444444444444445) internal successors, (3212), 990 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:35,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3212 transitions. [2021-07-09 17:47:35,174 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3212 transitions. Word has length 25 [2021-07-09 17:47:35,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:35,174 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 3212 transitions. [2021-07-09 17:47:35,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:35,174 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3212 transitions. [2021-07-09 17:47:35,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:35,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:35,175 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:35,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8186,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:35,389 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:35,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:35,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1561822212, now seen corresponding path program 374 times [2021-07-09 17:47:35,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:35,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289980123] [2021-07-09 17:47:35,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:35,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:35,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289980123] [2021-07-09 17:47:35,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289980123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:35,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205286072] [2021-07-09 17:47:35,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:35,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:35,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:35,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:35,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:35,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205286072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:35,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:35,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:35,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702251082] [2021-07-09 17:47:35,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:35,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:35,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:35,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:35,847 INFO L87 Difference]: Start difference. First operand 991 states and 3212 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:37,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:37,367 INFO L93 Difference]: Finished difference Result 1495 states and 4649 transitions. [2021-07-09 17:47:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 17:47:37,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:37,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:37,370 INFO L225 Difference]: With dead ends: 1495 [2021-07-09 17:47:37,370 INFO L226 Difference]: Without dead ends: 1443 [2021-07-09 17:47:37,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1043.5ms TimeCoverageRelationStatistics Valid=565, Invalid=4127, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 17:47:37,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-07-09 17:47:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 935. [2021-07-09 17:47:37,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 3.226980728051392) internal successors, (3014), 934 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:37,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 3014 transitions. [2021-07-09 17:47:37,383 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 3014 transitions. Word has length 25 [2021-07-09 17:47:37,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:37,383 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 3014 transitions. [2021-07-09 17:47:37,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:37,383 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 3014 transitions. [2021-07-09 17:47:37,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:37,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:37,384 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:37,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8195 [2021-07-09 17:47:37,600 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:37,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:37,600 INFO L82 PathProgramCache]: Analyzing trace with hash 275129396, now seen corresponding path program 375 times [2021-07-09 17:47:37,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:37,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439799203] [2021-07-09 17:47:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:37,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:37,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439799203] [2021-07-09 17:47:37,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439799203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:37,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561109739] [2021-07-09 17:47:37,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:37,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:47:37,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:37,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:37,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:38,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561109739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:38,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:38,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:38,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151881710] [2021-07-09 17:47:38,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:38,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:38,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:38,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:38,084 INFO L87 Difference]: Start difference. First operand 935 states and 3014 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:39,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:39,607 INFO L93 Difference]: Finished difference Result 1836 states and 5621 transitions. [2021-07-09 17:47:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 17:47:39,607 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:39,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:39,610 INFO L225 Difference]: With dead ends: 1836 [2021-07-09 17:47:39,610 INFO L226 Difference]: Without dead ends: 1758 [2021-07-09 17:47:39,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 1036.3ms TimeCoverageRelationStatistics Valid=441, Invalid=3849, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 17:47:39,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-07-09 17:47:39,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1005. [2021-07-09 17:47:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 3.25796812749004) internal successors, (3271), 1004 states have internal predecessors, (3271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3271 transitions. [2021-07-09 17:47:39,626 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3271 transitions. Word has length 25 [2021-07-09 17:47:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:39,626 INFO L482 AbstractCegarLoop]: Abstraction has 1005 states and 3271 transitions. [2021-07-09 17:47:39,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3271 transitions. [2021-07-09 17:47:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:39,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:39,627 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:39,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8214 [2021-07-09 17:47:39,841 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:39,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:39,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1460211376, now seen corresponding path program 376 times [2021-07-09 17:47:39,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:39,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427792455] [2021-07-09 17:47:39,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:39,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:39,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427792455] [2021-07-09 17:47:39,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427792455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:39,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234136036] [2021-07-09 17:47:39,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:40,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:40,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:40,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:40,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:40,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234136036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:40,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:40,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:40,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072016504] [2021-07-09 17:47:40,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:40,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:40,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:40,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:40,387 INFO L87 Difference]: Start difference. First operand 1005 states and 3271 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:41,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:41,870 INFO L93 Difference]: Finished difference Result 1911 states and 5874 transitions. [2021-07-09 17:47:41,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 17:47:41,870 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:41,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:41,873 INFO L225 Difference]: With dead ends: 1911 [2021-07-09 17:47:41,873 INFO L226 Difference]: Without dead ends: 1859 [2021-07-09 17:47:41,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 883.6ms TimeCoverageRelationStatistics Valid=534, Invalid=4296, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 17:47:41,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2021-07-09 17:47:41,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 992. [2021-07-09 17:47:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.256306760847629) internal successors, (3227), 991 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3227 transitions. [2021-07-09 17:47:41,889 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3227 transitions. Word has length 25 [2021-07-09 17:47:41,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:41,889 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3227 transitions. [2021-07-09 17:47:41,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3227 transitions. [2021-07-09 17:47:41,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:41,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:41,890 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:42,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8242 [2021-07-09 17:47:42,106 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:42,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:42,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1074702980, now seen corresponding path program 377 times [2021-07-09 17:47:42,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:42,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455258276] [2021-07-09 17:47:42,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:42,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:42,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455258276] [2021-07-09 17:47:42,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455258276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:42,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155823223] [2021-07-09 17:47:42,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:42,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:47:42,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:42,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:42,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:42,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155823223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:42,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:42,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:42,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931233726] [2021-07-09 17:47:42,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:42,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:42,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:42,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:42,524 INFO L87 Difference]: Start difference. First operand 992 states and 3227 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:44,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:44,207 INFO L93 Difference]: Finished difference Result 1655 states and 5144 transitions. [2021-07-09 17:47:44,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 17:47:44,207 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:44,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:44,210 INFO L225 Difference]: With dead ends: 1655 [2021-07-09 17:47:44,210 INFO L226 Difference]: Without dead ends: 1603 [2021-07-09 17:47:44,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 886.7ms TimeCoverageRelationStatistics Valid=518, Invalid=4738, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 17:47:44,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-07-09 17:47:44,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 906. [2021-07-09 17:47:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.2220994475138123) internal successors, (2916), 905 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:44,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2916 transitions. [2021-07-09 17:47:44,224 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2916 transitions. Word has length 25 [2021-07-09 17:47:44,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:44,224 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 2916 transitions. [2021-07-09 17:47:44,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2916 transitions. [2021-07-09 17:47:44,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:44,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:44,225 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:44,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8287,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:44,441 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:44,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:44,441 INFO L82 PathProgramCache]: Analyzing trace with hash -53353936, now seen corresponding path program 378 times [2021-07-09 17:47:44,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:44,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053349844] [2021-07-09 17:47:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:44,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:44,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053349844] [2021-07-09 17:47:44,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053349844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:44,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077525060] [2021-07-09 17:47:44,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:44,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:47:44,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:44,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:44,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:44,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077525060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:44,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:44,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:44,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988310606] [2021-07-09 17:47:44,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:44,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:44,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:44,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:44,884 INFO L87 Difference]: Start difference. First operand 906 states and 2916 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:46,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:46,278 INFO L93 Difference]: Finished difference Result 1471 states and 4521 transitions. [2021-07-09 17:47:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 17:47:46,279 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:46,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:46,281 INFO L225 Difference]: With dead ends: 1471 [2021-07-09 17:47:46,281 INFO L226 Difference]: Without dead ends: 1350 [2021-07-09 17:47:46,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 861.2ms TimeCoverageRelationStatistics Valid=370, Invalid=3536, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 17:47:46,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-07-09 17:47:46,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 948. [2021-07-09 17:47:46,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 3.2270327349524814) internal successors, (3056), 947 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 3056 transitions. [2021-07-09 17:47:46,294 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 3056 transitions. Word has length 25 [2021-07-09 17:47:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:46,294 INFO L482 AbstractCegarLoop]: Abstraction has 948 states and 3056 transitions. [2021-07-09 17:47:46,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 3056 transitions. [2021-07-09 17:47:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:46,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:46,295 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:46,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8293,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:46,512 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:46,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:46,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1970518220, now seen corresponding path program 379 times [2021-07-09 17:47:46,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:46,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199873941] [2021-07-09 17:47:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:46,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:46,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199873941] [2021-07-09 17:47:46,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199873941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:46,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615197754] [2021-07-09 17:47:46,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:46,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:46,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:46,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615197754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:46,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:46,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:46,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577216713] [2021-07-09 17:47:46,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:46,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:46,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:46,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:46,969 INFO L87 Difference]: Start difference. First operand 948 states and 3056 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:49,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:49,263 INFO L93 Difference]: Finished difference Result 1694 states and 5196 transitions. [2021-07-09 17:47:49,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 17:47:49,263 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:49,266 INFO L225 Difference]: With dead ends: 1694 [2021-07-09 17:47:49,266 INFO L226 Difference]: Without dead ends: 1616 [2021-07-09 17:47:49,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2281 ImplicationChecksByTransitivity, 1660.6ms TimeCoverageRelationStatistics Valid=741, Invalid=6065, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 17:47:49,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-07-09 17:47:49,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 992. [2021-07-09 17:47:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.2431886982845612) internal successors, (3214), 991 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3214 transitions. [2021-07-09 17:47:49,280 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3214 transitions. Word has length 25 [2021-07-09 17:47:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:49,280 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3214 transitions. [2021-07-09 17:47:49,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:49,280 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3214 transitions. [2021-07-09 17:47:49,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:49,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:49,282 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:49,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8310 [2021-07-09 17:47:49,498 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:49,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:49,498 INFO L82 PathProgramCache]: Analyzing trace with hash -785436240, now seen corresponding path program 380 times [2021-07-09 17:47:49,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:49,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754891386] [2021-07-09 17:47:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:49,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:49,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754891386] [2021-07-09 17:47:49,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754891386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:49,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107956899] [2021-07-09 17:47:49,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:49,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:49,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:49,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:49,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:49,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107956899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:49,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:49,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:49,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325198827] [2021-07-09 17:47:49,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:49,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:49,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:49,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:49,969 INFO L87 Difference]: Start difference. First operand 992 states and 3214 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:51,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:51,387 INFO L93 Difference]: Finished difference Result 1552 states and 4821 transitions. [2021-07-09 17:47:51,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 17:47:51,388 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:51,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:51,390 INFO L225 Difference]: With dead ends: 1552 [2021-07-09 17:47:51,390 INFO L226 Difference]: Without dead ends: 1500 [2021-07-09 17:47:51,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 1016.0ms TimeCoverageRelationStatistics Valid=640, Invalid=4616, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 17:47:51,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-07-09 17:47:51,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 936. [2021-07-09 17:47:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 3.225668449197861) internal successors, (3016), 935 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:51,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 3016 transitions. [2021-07-09 17:47:51,404 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 3016 transitions. Word has length 25 [2021-07-09 17:47:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:51,404 INFO L482 AbstractCegarLoop]: Abstraction has 936 states and 3016 transitions. [2021-07-09 17:47:51,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:51,404 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 3016 transitions. [2021-07-09 17:47:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:51,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:51,405 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:51,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8328,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:51,621 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:51,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:51,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1051515368, now seen corresponding path program 381 times [2021-07-09 17:47:51,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:51,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209109036] [2021-07-09 17:47:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:51,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:51,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209109036] [2021-07-09 17:47:51,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209109036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:51,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114233079] [2021-07-09 17:47:51,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:51,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:47:51,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:51,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:51,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:52,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114233079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:52,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:52,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:52,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406459868] [2021-07-09 17:47:52,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:52,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:52,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:52,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:52,300 INFO L87 Difference]: Start difference. First operand 936 states and 3016 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:54,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:54,345 INFO L93 Difference]: Finished difference Result 1792 states and 5483 transitions. [2021-07-09 17:47:54,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 17:47:54,345 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:54,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:54,348 INFO L225 Difference]: With dead ends: 1792 [2021-07-09 17:47:54,348 INFO L226 Difference]: Without dead ends: 1714 [2021-07-09 17:47:54,348 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1428.0ms TimeCoverageRelationStatistics Valid=560, Invalid=4696, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 17:47:54,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-07-09 17:47:54,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1006. [2021-07-09 17:47:54,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.256716417910448) internal successors, (3273), 1005 states have internal predecessors, (3273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3273 transitions. [2021-07-09 17:47:54,362 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3273 transitions. Word has length 25 [2021-07-09 17:47:54,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:54,362 INFO L482 AbstractCegarLoop]: Abstraction has 1006 states and 3273 transitions. [2021-07-09 17:47:54,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:54,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3273 transitions. [2021-07-09 17:47:54,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:54,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:54,363 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:54,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8342 [2021-07-09 17:47:54,578 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:54,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:54,578 INFO L82 PathProgramCache]: Analyzing trace with hash -2058369948, now seen corresponding path program 382 times [2021-07-09 17:47:54,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:54,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093767147] [2021-07-09 17:47:54,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:54,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:54,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093767147] [2021-07-09 17:47:54,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093767147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:54,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110109122] [2021-07-09 17:47:54,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:54,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:54,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:54,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:54,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:55,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110109122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:55,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:55,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:55,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101233707] [2021-07-09 17:47:55,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:55,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:55,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:55,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:55,051 INFO L87 Difference]: Start difference. First operand 1006 states and 3273 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:56,578 INFO L93 Difference]: Finished difference Result 1838 states and 5649 transitions. [2021-07-09 17:47:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 17:47:56,578 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:56,581 INFO L225 Difference]: With dead ends: 1838 [2021-07-09 17:47:56,581 INFO L226 Difference]: Without dead ends: 1786 [2021-07-09 17:47:56,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1153.5ms TimeCoverageRelationStatistics Valid=686, Invalid=5014, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 17:47:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-07-09 17:47:56,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 993. [2021-07-09 17:47:56,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 3.255040322580645) internal successors, (3229), 992 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 3229 transitions. [2021-07-09 17:47:56,619 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 3229 transitions. Word has length 25 [2021-07-09 17:47:56,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:56,619 INFO L482 AbstractCegarLoop]: Abstraction has 993 states and 3229 transitions. [2021-07-09 17:47:56,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:56,619 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 3229 transitions. [2021-07-09 17:47:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:56,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:56,621 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:56,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8455 [2021-07-09 17:47:56,837 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:56,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:56,837 INFO L82 PathProgramCache]: Analyzing trace with hash -298317008, now seen corresponding path program 383 times [2021-07-09 17:47:56,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:56,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649897471] [2021-07-09 17:47:56,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:56,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:56,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649897471] [2021-07-09 17:47:56,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649897471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:56,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256475755] [2021-07-09 17:47:56,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:57,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:47:57,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:57,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:57,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:57,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256475755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:57,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:57,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:57,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63844554] [2021-07-09 17:47:57,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:57,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:57,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:57,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:57,200 INFO L87 Difference]: Start difference. First operand 993 states and 3229 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:58,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:58,606 INFO L93 Difference]: Finished difference Result 1639 states and 5093 transitions. [2021-07-09 17:47:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 17:47:58,607 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:47:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:58,609 INFO L225 Difference]: With dead ends: 1639 [2021-07-09 17:47:58,609 INFO L226 Difference]: Without dead ends: 1587 [2021-07-09 17:47:58,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 816.4ms TimeCoverageRelationStatistics Valid=507, Invalid=4463, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:47:58,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-07-09 17:47:58,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 921. [2021-07-09 17:47:58,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 3.222826086956522) internal successors, (2965), 920 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:58,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 2965 transitions. [2021-07-09 17:47:58,622 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 2965 transitions. Word has length 25 [2021-07-09 17:47:58,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:58,622 INFO L482 AbstractCegarLoop]: Abstraction has 921 states and 2965 transitions. [2021-07-09 17:47:58,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:58,623 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 2965 transitions. [2021-07-09 17:47:58,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:47:58,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:58,624 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:58,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8485,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:58,840 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:58,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:58,840 INFO L82 PathProgramCache]: Analyzing trace with hash 245276084, now seen corresponding path program 384 times [2021-07-09 17:47:58,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:58,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936533508] [2021-07-09 17:47:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:58,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:58,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936533508] [2021-07-09 17:47:58,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936533508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:58,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717587579] [2021-07-09 17:47:58,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:59,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:47:59,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:59,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:47:59,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:59,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717587579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:59,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:59,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:47:59,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078052618] [2021-07-09 17:47:59,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:47:59,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:59,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:47:59,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:47:59,394 INFO L87 Difference]: Start difference. First operand 921 states and 2965 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:01,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:01,395 INFO L93 Difference]: Finished difference Result 1809 states and 5531 transitions. [2021-07-09 17:48:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 17:48:01,395 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:01,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:01,398 INFO L225 Difference]: With dead ends: 1809 [2021-07-09 17:48:01,398 INFO L226 Difference]: Without dead ends: 1731 [2021-07-09 17:48:01,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 1311.3ms TimeCoverageRelationStatistics Valid=524, Invalid=4032, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 17:48:01,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-07-09 17:48:01,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1020. [2021-07-09 17:48:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 3.2688910696761533) internal successors, (3331), 1019 states have internal predecessors, (3331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:01,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3331 transitions. [2021-07-09 17:48:01,413 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3331 transitions. Word has length 25 [2021-07-09 17:48:01,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:01,413 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 3331 transitions. [2021-07-09 17:48:01,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:01,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3331 transitions. [2021-07-09 17:48:01,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:01,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:01,414 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:01,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8491,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:01,617 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:01,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:01,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1430358064, now seen corresponding path program 385 times [2021-07-09 17:48:01,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:01,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979021141] [2021-07-09 17:48:01,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:01,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:01,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979021141] [2021-07-09 17:48:01,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979021141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:01,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573539914] [2021-07-09 17:48:01,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:01,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:48:01,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:02,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573539914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:02,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:02,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:48:02,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621592535] [2021-07-09 17:48:02,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:48:02,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:02,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:48:02,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:48:02,366 INFO L87 Difference]: Start difference. First operand 1020 states and 3331 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:04,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:04,416 INFO L93 Difference]: Finished difference Result 1883 states and 5773 transitions. [2021-07-09 17:48:04,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 17:48:04,416 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:04,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:04,419 INFO L225 Difference]: With dead ends: 1883 [2021-07-09 17:48:04,419 INFO L226 Difference]: Without dead ends: 1831 [2021-07-09 17:48:04,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 1375.2ms TimeCoverageRelationStatistics Valid=725, Invalid=5127, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 17:48:04,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-07-09 17:48:04,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1007. [2021-07-09 17:48:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 3.2673956262425445) internal successors, (3287), 1006 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 3287 transitions. [2021-07-09 17:48:04,434 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 3287 transitions. Word has length 25 [2021-07-09 17:48:04,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:04,434 INFO L482 AbstractCegarLoop]: Abstraction has 1007 states and 3287 transitions. [2021-07-09 17:48:04,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:04,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 3287 transitions. [2021-07-09 17:48:04,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:04,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:04,436 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:04,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8531 [2021-07-09 17:48:04,652 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:04,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1104556292, now seen corresponding path program 386 times [2021-07-09 17:48:04,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:04,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206932374] [2021-07-09 17:48:04,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:04,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:04,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206932374] [2021-07-09 17:48:04,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206932374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:04,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374807073] [2021-07-09 17:48:04,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:04,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:04,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:04,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:48:04,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:05,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374807073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:05,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:05,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:48:05,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919001896] [2021-07-09 17:48:05,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:48:05,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:05,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:48:05,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:48:05,106 INFO L87 Difference]: Start difference. First operand 1007 states and 3287 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:06,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:06,888 INFO L93 Difference]: Finished difference Result 1638 states and 5108 transitions. [2021-07-09 17:48:06,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 17:48:06,888 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:06,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:06,891 INFO L225 Difference]: With dead ends: 1638 [2021-07-09 17:48:06,891 INFO L226 Difference]: Without dead ends: 1586 [2021-07-09 17:48:06,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 1253.8ms TimeCoverageRelationStatistics Valid=580, Invalid=4532, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 17:48:06,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-07-09 17:48:06,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 992. [2021-07-09 17:48:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.265388496468214) internal successors, (3236), 991 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3236 transitions. [2021-07-09 17:48:06,905 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3236 transitions. Word has length 25 [2021-07-09 17:48:06,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:06,905 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3236 transitions. [2021-07-09 17:48:06,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3236 transitions. [2021-07-09 17:48:06,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:06,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:06,906 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:07,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8663 [2021-07-09 17:48:07,121 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:07,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1917477296, now seen corresponding path program 387 times [2021-07-09 17:48:07,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:07,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616175856] [2021-07-09 17:48:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:07,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:07,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616175856] [2021-07-09 17:48:07,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616175856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:07,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082024712] [2021-07-09 17:48:07,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:07,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:48:07,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:07,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:48:07,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:07,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082024712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:07,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:07,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:48:07,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352732104] [2021-07-09 17:48:07,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:48:07,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:07,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:48:07,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:48:07,564 INFO L87 Difference]: Start difference. First operand 992 states and 3236 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:09,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:09,118 INFO L93 Difference]: Finished difference Result 1573 states and 4896 transitions. [2021-07-09 17:48:09,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 17:48:09,118 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:09,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:09,121 INFO L225 Difference]: With dead ends: 1573 [2021-07-09 17:48:09,121 INFO L226 Difference]: Without dead ends: 1521 [2021-07-09 17:48:09,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 952.9ms TimeCoverageRelationStatistics Valid=509, Invalid=4321, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 17:48:09,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2021-07-09 17:48:09,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 893. [2021-07-09 17:48:09,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.2208520179372195) internal successors, (2873), 892 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:09,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2873 transitions. [2021-07-09 17:48:09,134 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2873 transitions. Word has length 25 [2021-07-09 17:48:09,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:09,134 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 2873 transitions. [2021-07-09 17:48:09,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:09,134 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2873 transitions. [2021-07-09 17:48:09,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:09,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:09,135 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:09,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8669,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:09,347 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:09,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:09,347 INFO L82 PathProgramCache]: Analyzing trace with hash -458628254, now seen corresponding path program 388 times [2021-07-09 17:48:09,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:09,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361300552] [2021-07-09 17:48:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:09,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:09,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361300552] [2021-07-09 17:48:09,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361300552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:09,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642620135] [2021-07-09 17:48:09,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:09,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:09,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:09,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:48:09,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:09,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642620135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:09,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:09,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:48:09,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334674812] [2021-07-09 17:48:09,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:48:09,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:09,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:48:09,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:48:09,791 INFO L87 Difference]: Start difference. First operand 893 states and 2873 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:11,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:11,710 INFO L93 Difference]: Finished difference Result 1474 states and 4523 transitions. [2021-07-09 17:48:11,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 17:48:11,710 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:11,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:11,713 INFO L225 Difference]: With dead ends: 1474 [2021-07-09 17:48:11,713 INFO L226 Difference]: Without dead ends: 1353 [2021-07-09 17:48:11,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 1167.9ms TimeCoverageRelationStatistics Valid=525, Invalid=5175, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 17:48:11,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-07-09 17:48:11,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 897. [2021-07-09 17:48:11,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.2154017857142856) internal successors, (2881), 896 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2881 transitions. [2021-07-09 17:48:11,725 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2881 transitions. Word has length 25 [2021-07-09 17:48:11,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:11,725 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 2881 transitions. [2021-07-09 17:48:11,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:11,725 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2881 transitions. [2021-07-09 17:48:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:11,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:11,726 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:11,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8675 [2021-07-09 17:48:11,942 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:11,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:11,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1919174758, now seen corresponding path program 389 times [2021-07-09 17:48:11,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:11,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048657139] [2021-07-09 17:48:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:12,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:12,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048657139] [2021-07-09 17:48:12,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048657139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:12,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630813343] [2021-07-09 17:48:12,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:12,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:48:12,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:12,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:48:12,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:12,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630813343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:12,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:12,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:48:12,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52290677] [2021-07-09 17:48:12,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:48:12,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:12,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:48:12,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:48:12,411 INFO L87 Difference]: Start difference. First operand 897 states and 2881 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:15,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:15,031 INFO L93 Difference]: Finished difference Result 1790 states and 5503 transitions. [2021-07-09 17:48:15,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-09 17:48:15,031 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:15,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:15,034 INFO L225 Difference]: With dead ends: 1790 [2021-07-09 17:48:15,034 INFO L226 Difference]: Without dead ends: 1712 [2021-07-09 17:48:15,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2808 ImplicationChecksByTransitivity, 1804.6ms TimeCoverageRelationStatistics Valid=782, Invalid=7408, Unknown=0, NotChecked=0, Total=8190 [2021-07-09 17:48:15,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-07-09 17:48:15,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 938. [2021-07-09 17:48:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.2283884738527213) internal successors, (3025), 937 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3025 transitions. [2021-07-09 17:48:15,048 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3025 transitions. Word has length 25 [2021-07-09 17:48:15,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:15,048 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 3025 transitions. [2021-07-09 17:48:15,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:15,048 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3025 transitions. [2021-07-09 17:48:15,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:15,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:15,049 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:15,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8688 [2021-07-09 17:48:15,266 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:15,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:15,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1190710558, now seen corresponding path program 390 times [2021-07-09 17:48:15,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:15,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361892717] [2021-07-09 17:48:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:15,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:15,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361892717] [2021-07-09 17:48:15,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361892717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:15,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579166433] [2021-07-09 17:48:15,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:15,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:48:15,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:15,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:48:15,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:15,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579166433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:15,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:15,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:48:15,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998593280] [2021-07-09 17:48:15,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:48:15,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:15,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:48:15,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:48:15,733 INFO L87 Difference]: Start difference. First operand 938 states and 3025 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:17,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:17,589 INFO L93 Difference]: Finished difference Result 1596 states and 4957 transitions. [2021-07-09 17:48:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-09 17:48:17,590 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:17,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:17,592 INFO L225 Difference]: With dead ends: 1596 [2021-07-09 17:48:17,592 INFO L226 Difference]: Without dead ends: 1544 [2021-07-09 17:48:17,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 1221.8ms TimeCoverageRelationStatistics Valid=787, Invalid=6523, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 17:48:17,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-07-09 17:48:17,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 878. [2021-07-09 17:48:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.2052451539338653) internal successors, (2811), 877 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2811 transitions. [2021-07-09 17:48:17,606 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2811 transitions. Word has length 25 [2021-07-09 17:48:17,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:17,606 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2811 transitions. [2021-07-09 17:48:17,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2811 transitions. [2021-07-09 17:48:17,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:17,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:17,607 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:17,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8697 [2021-07-09 17:48:17,823 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash 646241050, now seen corresponding path program 391 times [2021-07-09 17:48:17,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:17,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345776540] [2021-07-09 17:48:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:17,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:17,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345776540] [2021-07-09 17:48:17,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345776540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:17,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766062479] [2021-07-09 17:48:17,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:18,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:48:18,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:18,396 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:18,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766062479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:18,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:18,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:48:18,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125750154] [2021-07-09 17:48:18,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:48:18,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:18,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:48:18,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:48:18,396 INFO L87 Difference]: Start difference. First operand 878 states and 2811 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:20,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:20,656 INFO L93 Difference]: Finished difference Result 1955 states and 5962 transitions. [2021-07-09 17:48:20,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-09 17:48:20,657 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:20,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:20,660 INFO L225 Difference]: With dead ends: 1955 [2021-07-09 17:48:20,660 INFO L226 Difference]: Without dead ends: 1877 [2021-07-09 17:48:20,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 1578.4ms TimeCoverageRelationStatistics Valid=707, Invalid=6775, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 17:48:20,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-07-09 17:48:20,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 947. [2021-07-09 17:48:20,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.2389006342494713) internal successors, (3064), 946 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3064 transitions. [2021-07-09 17:48:20,674 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3064 transitions. Word has length 25 [2021-07-09 17:48:20,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:20,674 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3064 transitions. [2021-07-09 17:48:20,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:20,674 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3064 transitions. [2021-07-09 17:48:20,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:20,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:20,675 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:20,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8714,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:20,889 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:20,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:20,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1831323030, now seen corresponding path program 392 times [2021-07-09 17:48:20,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:20,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885287235] [2021-07-09 17:48:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:20,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:20,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885287235] [2021-07-09 17:48:20,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885287235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:20,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470409326] [2021-07-09 17:48:20,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:21,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:21,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:21,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:48:21,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:21,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470409326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:21,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:21,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:48:21,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835965864] [2021-07-09 17:48:21,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:48:21,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:21,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:48:21,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:48:21,403 INFO L87 Difference]: Start difference. First operand 947 states and 3064 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:24,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:24,036 INFO L93 Difference]: Finished difference Result 2050 states and 6284 transitions. [2021-07-09 17:48:24,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-09 17:48:24,037 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:24,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:24,040 INFO L225 Difference]: With dead ends: 2050 [2021-07-09 17:48:24,040 INFO L226 Difference]: Without dead ends: 1998 [2021-07-09 17:48:24,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 1572.1ms TimeCoverageRelationStatistics Valid=912, Invalid=8018, Unknown=0, NotChecked=0, Total=8930 [2021-07-09 17:48:24,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-07-09 17:48:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 934. [2021-07-09 17:48:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.2368703108252945) internal successors, (3020), 933 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3020 transitions. [2021-07-09 17:48:24,056 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3020 transitions. Word has length 25 [2021-07-09 17:48:24,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:24,056 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 3020 transitions. [2021-07-09 17:48:24,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3020 transitions. [2021-07-09 17:48:24,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:24,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:24,057 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:24,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8767,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:24,273 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:24,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:24,273 INFO L82 PathProgramCache]: Analyzing trace with hash -703591326, now seen corresponding path program 393 times [2021-07-09 17:48:24,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:24,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209486970] [2021-07-09 17:48:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:24,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:24,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209486970] [2021-07-09 17:48:24,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209486970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:24,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091604175] [2021-07-09 17:48:24,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:24,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:48:24,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:24,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:48:24,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:24,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091604175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:24,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:24,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:48:24,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624590902] [2021-07-09 17:48:24,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:48:24,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:24,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:48:24,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:48:24,748 INFO L87 Difference]: Start difference. First operand 934 states and 3020 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:26,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:26,875 INFO L93 Difference]: Finished difference Result 1714 states and 5308 transitions. [2021-07-09 17:48:26,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-09 17:48:26,875 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:26,878 INFO L225 Difference]: With dead ends: 1714 [2021-07-09 17:48:26,878 INFO L226 Difference]: Without dead ends: 1662 [2021-07-09 17:48:26,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 1192.0ms TimeCoverageRelationStatistics Valid=646, Invalid=6160, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 17:48:26,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-07-09 17:48:26,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 862. [2021-07-09 17:48:26,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.2009291521486642) internal successors, (2756), 861 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2756 transitions. [2021-07-09 17:48:26,891 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2756 transitions. Word has length 25 [2021-07-09 17:48:26,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:26,891 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2756 transitions. [2021-07-09 17:48:26,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:26,891 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2756 transitions. [2021-07-09 17:48:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:26,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:26,893 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:27,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8809,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:27,109 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:27,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:27,109 INFO L82 PathProgramCache]: Analyzing trace with hash -159998234, now seen corresponding path program 394 times [2021-07-09 17:48:27,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:27,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537938752] [2021-07-09 17:48:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:27,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:27,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537938752] [2021-07-09 17:48:27,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537938752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:27,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400887012] [2021-07-09 17:48:27,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:27,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:27,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:27,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:48:27,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:27,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400887012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:27,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:27,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:48:27,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243644621] [2021-07-09 17:48:27,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:48:27,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:27,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:48:27,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:48:27,798 INFO L87 Difference]: Start difference. First operand 862 states and 2756 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:30,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:30,074 INFO L93 Difference]: Finished difference Result 1736 states and 5285 transitions. [2021-07-09 17:48:30,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 17:48:30,074 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:30,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:30,076 INFO L225 Difference]: With dead ends: 1736 [2021-07-09 17:48:30,077 INFO L226 Difference]: Without dead ends: 1658 [2021-07-09 17:48:30,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1185.2ms TimeCoverageRelationStatistics Valid=505, Invalid=4751, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 17:48:30,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-07-09 17:48:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 959. [2021-07-09 17:48:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.2526096033402925) internal successors, (3116), 958 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3116 transitions. [2021-07-09 17:48:30,090 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3116 transitions. Word has length 25 [2021-07-09 17:48:30,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:30,091 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 3116 transitions. [2021-07-09 17:48:30,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:30,091 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3116 transitions. [2021-07-09 17:48:30,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:30,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:30,092 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:30,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8815,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:30,308 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:30,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:30,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1025083746, now seen corresponding path program 395 times [2021-07-09 17:48:30,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:30,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987757249] [2021-07-09 17:48:30,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:30,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:30,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987757249] [2021-07-09 17:48:30,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987757249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:30,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103142749] [2021-07-09 17:48:30,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:30,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:48:30,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:30,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:48:30,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:30,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103142749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:30,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:30,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:48:30,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246348418] [2021-07-09 17:48:30,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:48:30,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:30,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:48:30,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:48:30,950 INFO L87 Difference]: Start difference. First operand 959 states and 3116 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:32,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:32,830 INFO L93 Difference]: Finished difference Result 1641 states and 5003 transitions. [2021-07-09 17:48:32,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 17:48:32,830 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:32,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:32,832 INFO L225 Difference]: With dead ends: 1641 [2021-07-09 17:48:32,833 INFO L226 Difference]: Without dead ends: 1589 [2021-07-09 17:48:32,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 1009.9ms TimeCoverageRelationStatistics Valid=557, Invalid=4413, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:48:32,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-07-09 17:48:32,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 946. [2021-07-09 17:48:32,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 3.250793650793651) internal successors, (3072), 945 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 3072 transitions. [2021-07-09 17:48:32,846 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 3072 transitions. Word has length 25 [2021-07-09 17:48:32,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:32,846 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 3072 transitions. [2021-07-09 17:48:32,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 3072 transitions. [2021-07-09 17:48:32,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:32,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:32,848 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:33,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8874 [2021-07-09 17:48:33,061 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:33,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:33,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1509830610, now seen corresponding path program 396 times [2021-07-09 17:48:33,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:33,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848520662] [2021-07-09 17:48:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:33,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:33,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848520662] [2021-07-09 17:48:33,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848520662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:33,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421598751] [2021-07-09 17:48:33,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:33,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:48:33,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:33,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:48:33,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:33,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421598751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:33,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:33,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:48:33,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330069950] [2021-07-09 17:48:33,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:48:33,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:33,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:48:33,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:48:33,622 INFO L87 Difference]: Start difference. First operand 946 states and 3072 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:35,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:35,460 INFO L93 Difference]: Finished difference Result 1571 states and 4874 transitions. [2021-07-09 17:48:35,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 17:48:35,460 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:35,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:35,463 INFO L225 Difference]: With dead ends: 1571 [2021-07-09 17:48:35,463 INFO L226 Difference]: Without dead ends: 1519 [2021-07-09 17:48:35,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 1004.8ms TimeCoverageRelationStatistics Valid=462, Invalid=4368, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 17:48:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-07-09 17:48:35,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 931. [2021-07-09 17:48:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.2483870967741937) internal successors, (3021), 930 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3021 transitions. [2021-07-09 17:48:35,476 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3021 transitions. Word has length 25 [2021-07-09 17:48:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:35,476 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3021 transitions. [2021-07-09 17:48:35,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:35,476 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3021 transitions. [2021-07-09 17:48:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:35,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:35,477 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:35,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8933,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:35,694 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:35,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:35,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1512202978, now seen corresponding path program 397 times [2021-07-09 17:48:35,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:35,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877440154] [2021-07-09 17:48:35,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:35,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:35,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877440154] [2021-07-09 17:48:35,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877440154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:35,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597495050] [2021-07-09 17:48:35,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:35,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:48:35,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:36,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597495050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:36,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:36,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:48:36,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763020226] [2021-07-09 17:48:36,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:48:36,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:36,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:48:36,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:48:36,161 INFO L87 Difference]: Start difference. First operand 931 states and 3021 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:37,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:37,867 INFO L93 Difference]: Finished difference Result 1506 states and 4662 transitions. [2021-07-09 17:48:37,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 17:48:37,867 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:37,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:37,869 INFO L225 Difference]: With dead ends: 1506 [2021-07-09 17:48:37,870 INFO L226 Difference]: Without dead ends: 1454 [2021-07-09 17:48:37,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1028.3ms TimeCoverageRelationStatistics Valid=512, Invalid=4600, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 17:48:37,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-07-09 17:48:37,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 845. [2021-07-09 17:48:37,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2002369668246446) internal successors, (2701), 844 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2701 transitions. [2021-07-09 17:48:37,882 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2701 transitions. Word has length 25 [2021-07-09 17:48:37,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:37,882 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2701 transitions. [2021-07-09 17:48:37,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:37,882 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2701 transitions. [2021-07-09 17:48:37,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:37,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:37,883 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:38,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8939 [2021-07-09 17:48:38,100 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:38,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1142902924, now seen corresponding path program 398 times [2021-07-09 17:48:38,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:38,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207632381] [2021-07-09 17:48:38,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:38,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:38,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207632381] [2021-07-09 17:48:38,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207632381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:38,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469228296] [2021-07-09 17:48:38,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:38,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:38,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:38,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:48:38,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:38,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469228296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:38,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:38,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:48:38,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945998313] [2021-07-09 17:48:38,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:48:38,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:38,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:48:38,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:48:38,785 INFO L87 Difference]: Start difference. First operand 845 states and 2701 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:41,597 INFO L93 Difference]: Finished difference Result 1597 states and 4791 transitions. [2021-07-09 17:48:41,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 17:48:41,597 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:41,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:41,600 INFO L225 Difference]: With dead ends: 1597 [2021-07-09 17:48:41,600 INFO L226 Difference]: Without dead ends: 1519 [2021-07-09 17:48:41,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1981 ImplicationChecksByTransitivity, 1526.3ms TimeCoverageRelationStatistics Valid=605, Invalid=5401, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 17:48:41,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-07-09 17:48:41,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 878. [2021-07-09 17:48:41,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.1904218928164196) internal successors, (2798), 877 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2798 transitions. [2021-07-09 17:48:41,614 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2798 transitions. Word has length 25 [2021-07-09 17:48:41,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:41,615 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2798 transitions. [2021-07-09 17:48:41,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:41,615 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2798 transitions. [2021-07-09 17:48:41,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:41,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:41,616 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:41,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8945,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:41,829 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:41,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:41,829 INFO L82 PathProgramCache]: Analyzing trace with hash 42179056, now seen corresponding path program 399 times [2021-07-09 17:48:41,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:41,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934099314] [2021-07-09 17:48:41,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:41,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:41,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934099314] [2021-07-09 17:48:41,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934099314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:41,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419301992] [2021-07-09 17:48:41,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:42,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:48:42,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:42,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:48:42,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:42,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:48:42,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:42,222 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.3 percent of original size [2021-07-09 17:48:42,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:48:42,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:42,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:48:42,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:42,274 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.3 percent of original size [2021-07-09 17:48:42,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:48:42,276 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:122, output treesize:48 [2021-07-09 17:48:42,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:42,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:42,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:48:42,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:42,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:42,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:42,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:48:42,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:42,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:42,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:42,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:48:42,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:42,752 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:48:42,752 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:42,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:42,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:48:42,756 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:42,895 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-07-09 17:48:42,895 INFO L628 ElimStorePlain]: treesize reduction 140, result has 46.6 percent of original size [2021-07-09 17:48:42,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:48:42,899 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:42,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:48:42,903 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:42,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:42,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:48:42,967 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:368, output treesize:78 [2021-07-09 17:48:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:48:43,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419301992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:43,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:43,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:48:43,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220318487] [2021-07-09 17:48:43,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:43,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:43,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:43,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:43,137 INFO L87 Difference]: Start difference. First operand 878 states and 2798 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:45,867 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-07-09 17:48:46,481 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-07-09 17:48:46,764 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-07-09 17:48:47,134 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-07-09 17:48:47,634 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-07-09 17:48:47,785 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-07-09 17:48:47,962 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-07-09 17:48:48,139 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-07-09 17:48:48,294 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-07-09 17:48:48,430 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-07-09 17:48:48,649 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-07-09 17:48:49,173 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-07-09 17:48:49,392 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-07-09 17:48:49,550 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-07-09 17:48:49,724 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-07-09 17:48:50,097 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2021-07-09 17:48:50,230 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-07-09 17:48:50,514 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-07-09 17:48:50,789 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-07-09 17:48:50,929 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-07-09 17:48:51,114 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-07-09 17:48:51,492 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-07-09 17:48:51,794 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-07-09 17:48:52,034 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-07-09 17:48:52,235 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-07-09 17:48:52,547 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-07-09 17:48:52,950 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-07-09 17:48:52,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:52,981 INFO L93 Difference]: Finished difference Result 2145 states and 6267 transitions. [2021-07-09 17:48:52,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-07-09 17:48:52,981 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:52,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:52,984 INFO L225 Difference]: With dead ends: 2145 [2021-07-09 17:48:52,984 INFO L226 Difference]: Without dead ends: 1823 [2021-07-09 17:48:52,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7443 ImplicationChecksByTransitivity, 8361.6ms TimeCoverageRelationStatistics Valid=1818, Invalid=19062, Unknown=0, NotChecked=0, Total=20880 [2021-07-09 17:48:52,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-07-09 17:48:52,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1016. [2021-07-09 17:48:52,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.2) internal successors, (3248), 1015 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3248 transitions. [2021-07-09 17:48:53,000 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3248 transitions. Word has length 25 [2021-07-09 17:48:53,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:53,000 INFO L482 AbstractCegarLoop]: Abstraction has 1016 states and 3248 transitions. [2021-07-09 17:48:53,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:53,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3248 transitions. [2021-07-09 17:48:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:53,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:53,001 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:53,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9050,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:53,217 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:53,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:53,218 INFO L82 PathProgramCache]: Analyzing trace with hash 853194326, now seen corresponding path program 400 times [2021-07-09 17:48:53,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:53,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478756600] [2021-07-09 17:48:53,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:48:53,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:53,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478756600] [2021-07-09 17:48:53,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478756600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:53,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009971229] [2021-07-09 17:48:53,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:53,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:53,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:53,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:53,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:53,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:53,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:53,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:48:53,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:53,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:48:53,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:53,936 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-09 17:48:53,936 INFO L628 ElimStorePlain]: treesize reduction 35, result has 79.2 percent of original size [2021-07-09 17:48:53,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:48:53,941 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:53,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:48:53,945 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:54,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:54,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:48:54,016 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:54,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:48:54,019 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:54,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:54,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:48:54,086 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:54,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:54,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:48:54,150 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-07-09 17:48:54,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:48:54,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:54,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:54,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:48:54,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:54,448 INFO L628 ElimStorePlain]: treesize reduction 35, result has 47.8 percent of original size [2021-07-09 17:48:54,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:48:54,452 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:54,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:54,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:48:54,465 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-07-09 17:48:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:54,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009971229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:54,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:54,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-09 17:48:54,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254219648] [2021-07-09 17:48:54,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:48:54,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:54,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:48:54,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:48:54,526 INFO L87 Difference]: Start difference. First operand 1016 states and 3248 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:55,401 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-07-09 17:48:55,649 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-07-09 17:48:57,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:57,066 INFO L93 Difference]: Finished difference Result 1770 states and 5324 transitions. [2021-07-09 17:48:57,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:48:57,066 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:48:57,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:57,069 INFO L225 Difference]: With dead ends: 1770 [2021-07-09 17:48:57,069 INFO L226 Difference]: Without dead ends: 1632 [2021-07-09 17:48:57,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2412.4ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:48:57,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-07-09 17:48:57,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1027. [2021-07-09 17:48:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.211500974658869) internal successors, (3295), 1026 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3295 transitions. [2021-07-09 17:48:57,082 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3295 transitions. Word has length 25 [2021-07-09 17:48:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:57,082 INFO L482 AbstractCegarLoop]: Abstraction has 1027 states and 3295 transitions. [2021-07-09 17:48:57,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:57,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3295 transitions. [2021-07-09 17:48:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:48:57,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:57,083 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:57,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9150 [2021-07-09 17:48:57,299 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:57,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:57,300 INFO L82 PathProgramCache]: Analyzing trace with hash 561294408, now seen corresponding path program 401 times [2021-07-09 17:48:57,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:57,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247004239] [2021-07-09 17:48:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:48:57,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:57,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247004239] [2021-07-09 17:48:57,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247004239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:57,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272253151] [2021-07-09 17:48:57,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:57,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:48:57,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:57,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:48:57,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:57,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:57,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:57,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:48:57,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:57,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:48:57,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:57,983 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-09 17:48:57,984 INFO L628 ElimStorePlain]: treesize reduction 35, result has 79.2 percent of original size [2021-07-09 17:48:57,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:48:57,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:58,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:58,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:48:58,064 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:58,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:48:58,068 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:58,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:58,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:48:58,140 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:58,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:48:58,144 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:58,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:58,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:48:58,212 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-07-09 17:48:58,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:48:58,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:58,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:48:58,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:48:58,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:58,581 INFO L628 ElimStorePlain]: treesize reduction 78, result has 46.2 percent of original size [2021-07-09 17:48:58,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:48:58,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:58,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:58,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:48:58,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:58,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:58,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:48:58,655 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:48:58,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:48:58,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:48:58,686 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-07-09 17:48:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:58,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272253151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:58,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:58,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-09 17:48:58,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179040963] [2021-07-09 17:48:58,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:48:58,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:58,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:48:58,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:48:58,781 INFO L87 Difference]: Start difference. First operand 1027 states and 3295 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:59,424 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-07-09 17:48:59,777 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-07-09 17:48:59,918 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-07-09 17:49:00,151 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-07-09 17:49:00,304 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-07-09 17:49:00,452 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-07-09 17:49:00,602 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-07-09 17:49:00,781 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2021-07-09 17:49:00,932 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-07-09 17:49:01,084 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-07-09 17:49:01,238 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-07-09 17:49:01,446 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-07-09 17:49:01,604 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-07-09 17:49:01,799 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-07-09 17:49:01,959 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-07-09 17:49:02,168 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-07-09 17:49:02,314 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-07-09 17:49:02,494 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-07-09 17:49:02,660 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-07-09 17:49:02,849 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-07-09 17:49:03,151 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-07-09 17:49:03,300 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-07-09 17:49:03,506 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-07-09 17:49:03,670 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-07-09 17:49:03,832 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-07-09 17:49:04,143 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2021-07-09 17:49:04,294 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2021-07-09 17:49:04,499 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2021-07-09 17:49:04,639 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2021-07-09 17:49:04,850 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2021-07-09 17:49:05,156 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2021-07-09 17:49:05,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:05,375 INFO L93 Difference]: Finished difference Result 1975 states and 5843 transitions. [2021-07-09 17:49:05,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:49:05,375 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:05,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:05,378 INFO L225 Difference]: With dead ends: 1975 [2021-07-09 17:49:05,378 INFO L226 Difference]: Without dead ends: 1756 [2021-07-09 17:49:05,378 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 6080.1ms TimeCoverageRelationStatistics Valid=692, Invalid=3730, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 17:49:05,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-07-09 17:49:05,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1017. [2021-07-09 17:49:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 3.2096456692913384) internal successors, (3261), 1016 states have internal predecessors, (3261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3261 transitions. [2021-07-09 17:49:05,392 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3261 transitions. Word has length 25 [2021-07-09 17:49:05,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:05,392 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 3261 transitions. [2021-07-09 17:49:05,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:05,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3261 transitions. [2021-07-09 17:49:05,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:05,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:05,394 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:05,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9178,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:05,610 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:05,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:05,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1910473976, now seen corresponding path program 402 times [2021-07-09 17:49:05,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:05,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101712313] [2021-07-09 17:49:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:49:05,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:05,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101712313] [2021-07-09 17:49:05,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101712313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:05,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127415759] [2021-07-09 17:49:05,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:05,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:49:05,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:05,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:05,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:06,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:06,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:06,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:06,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:49:06,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:06,228 INFO L628 ElimStorePlain]: treesize reduction 29, result has 79.3 percent of original size [2021-07-09 17:49:06,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:06,234 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:06,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:06,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-07-09 17:49:06,282 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-07-09 17:49:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:06,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127415759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:06,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:06,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-09 17:49:06,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935783259] [2021-07-09 17:49:06,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:49:06,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:06,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:49:06,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:49:06,446 INFO L87 Difference]: Start difference. First operand 1017 states and 3261 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:08,025 INFO L93 Difference]: Finished difference Result 1594 states and 4846 transitions. [2021-07-09 17:49:08,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:49:08,026 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:08,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:08,028 INFO L225 Difference]: With dead ends: 1594 [2021-07-09 17:49:08,028 INFO L226 Difference]: Without dead ends: 1465 [2021-07-09 17:49:08,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1514.6ms TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:49:08,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-07-09 17:49:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1015. [2021-07-09 17:49:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.201183431952663) internal successors, (3246), 1014 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3246 transitions. [2021-07-09 17:49:08,041 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3246 transitions. Word has length 25 [2021-07-09 17:49:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:08,041 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3246 transitions. [2021-07-09 17:49:08,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3246 transitions. [2021-07-09 17:49:08,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:08,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:08,043 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:08,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9216 [2021-07-09 17:49:08,259 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:08,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:08,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1516618744, now seen corresponding path program 403 times [2021-07-09 17:49:08,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:08,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97654558] [2021-07-09 17:49:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:49:08,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:08,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97654558] [2021-07-09 17:49:08,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97654558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:08,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423706902] [2021-07-09 17:49:08,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:08,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:08,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:08,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:08,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:08,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:49:08,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:08,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:08,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:08,886 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-07-09 17:49:08,886 INFO L628 ElimStorePlain]: treesize reduction 6, result has 95.1 percent of original size [2021-07-09 17:49:08,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:08,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:08,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:08,894 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:08,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:08,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-07-09 17:49:08,953 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-07-09 17:49:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:09,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423706902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:09,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:09,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-09 17:49:09,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598625139] [2021-07-09 17:49:09,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:49:09,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:09,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:49:09,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:49:09,164 INFO L87 Difference]: Start difference. First operand 1015 states and 3246 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:10,360 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-09 17:49:10,849 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-07-09 17:49:11,012 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-07-09 17:49:11,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:11,467 INFO L93 Difference]: Finished difference Result 1442 states and 4403 transitions. [2021-07-09 17:49:11,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:49:11,467 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:11,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:11,469 INFO L225 Difference]: With dead ends: 1442 [2021-07-09 17:49:11,469 INFO L226 Difference]: Without dead ends: 1293 [2021-07-09 17:49:11,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2206.1ms TimeCoverageRelationStatistics Valid=335, Invalid=1645, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:49:11,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-07-09 17:49:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1015. [2021-07-09 17:49:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.193293885601578) internal successors, (3238), 1014 states have internal predecessors, (3238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3238 transitions. [2021-07-09 17:49:11,481 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3238 transitions. Word has length 25 [2021-07-09 17:49:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:11,481 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3238 transitions. [2021-07-09 17:49:11,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3238 transitions. [2021-07-09 17:49:11,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:11,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:11,483 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:11,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9236 [2021-07-09 17:49:11,699 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:11,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:11,699 INFO L82 PathProgramCache]: Analyzing trace with hash 772965990, now seen corresponding path program 404 times [2021-07-09 17:49:11,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:11,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143963772] [2021-07-09 17:49:11,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:11,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:11,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143963772] [2021-07-09 17:49:11,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143963772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:11,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643342935] [2021-07-09 17:49:11,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:11,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:11,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:11,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:49:11,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:12,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643342935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:12,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:12,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:49:12,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505060363] [2021-07-09 17:49:12,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:49:12,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:12,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:49:12,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:49:12,241 INFO L87 Difference]: Start difference. First operand 1015 states and 3238 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:14,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:14,327 INFO L93 Difference]: Finished difference Result 1664 states and 5107 transitions. [2021-07-09 17:49:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 17:49:14,327 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:14,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:14,329 INFO L225 Difference]: With dead ends: 1664 [2021-07-09 17:49:14,329 INFO L226 Difference]: Without dead ends: 1584 [2021-07-09 17:49:14,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1247.2ms TimeCoverageRelationStatistics Valid=501, Invalid=4329, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 17:49:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-07-09 17:49:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 996. [2021-07-09 17:49:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.191959798994975) internal successors, (3176), 995 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:14,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3176 transitions. [2021-07-09 17:49:14,343 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3176 transitions. Word has length 25 [2021-07-09 17:49:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:14,343 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3176 transitions. [2021-07-09 17:49:14,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:14,343 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3176 transitions. [2021-07-09 17:49:14,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:14,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:14,344 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:14,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9259 [2021-07-09 17:49:14,561 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:14,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:14,561 INFO L82 PathProgramCache]: Analyzing trace with hash -499967718, now seen corresponding path program 405 times [2021-07-09 17:49:14,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:14,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656718155] [2021-07-09 17:49:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:14,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:14,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656718155] [2021-07-09 17:49:14,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656718155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:14,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337155524] [2021-07-09 17:49:14,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:14,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:49:14,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:14,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:49:14,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:15,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337155524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:15,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:15,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:49:15,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320450436] [2021-07-09 17:49:15,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:49:15,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:15,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:49:15,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:49:15,091 INFO L87 Difference]: Start difference. First operand 996 states and 3176 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:16,972 INFO L93 Difference]: Finished difference Result 1708 states and 5268 transitions. [2021-07-09 17:49:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 17:49:16,973 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:16,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:16,975 INFO L225 Difference]: With dead ends: 1708 [2021-07-09 17:49:16,975 INFO L226 Difference]: Without dead ends: 1628 [2021-07-09 17:49:16,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1508 ImplicationChecksByTransitivity, 1333.8ms TimeCoverageRelationStatistics Valid=555, Invalid=4415, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:49:16,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-07-09 17:49:16,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 972. [2021-07-09 17:49:16,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.194644696189495) internal successors, (3102), 971 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 3102 transitions. [2021-07-09 17:49:16,989 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 3102 transitions. Word has length 25 [2021-07-09 17:49:16,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:16,989 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 3102 transitions. [2021-07-09 17:49:16,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 3102 transitions. [2021-07-09 17:49:16,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:16,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:16,990 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:17,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9266 [2021-07-09 17:49:17,207 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:17,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:17,207 INFO L82 PathProgramCache]: Analyzing trace with hash 438157004, now seen corresponding path program 406 times [2021-07-09 17:49:17,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:17,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518178055] [2021-07-09 17:49:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:17,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:17,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518178055] [2021-07-09 17:49:17,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518178055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:17,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013432762] [2021-07-09 17:49:17,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:17,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:17,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:17,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:49:17,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:17,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013432762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:17,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:17,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:49:17,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283626869] [2021-07-09 17:49:17,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:49:17,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:17,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:49:17,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:49:17,714 INFO L87 Difference]: Start difference. First operand 972 states and 3102 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:19,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:19,733 INFO L93 Difference]: Finished difference Result 1607 states and 4889 transitions. [2021-07-09 17:49:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 17:49:19,734 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:19,736 INFO L225 Difference]: With dead ends: 1607 [2021-07-09 17:49:19,736 INFO L226 Difference]: Without dead ends: 1527 [2021-07-09 17:49:19,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 1131.9ms TimeCoverageRelationStatistics Valid=589, Invalid=4667, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 17:49:19,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-07-09 17:49:19,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 850. [2021-07-09 17:49:19,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.1590106007067136) internal successors, (2682), 849 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2682 transitions. [2021-07-09 17:49:19,748 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2682 transitions. Word has length 25 [2021-07-09 17:49:19,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:19,748 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2682 transitions. [2021-07-09 17:49:19,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:19,749 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2682 transitions. [2021-07-09 17:49:19,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:19,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:19,750 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:19,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9273,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:19,966 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:19,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:19,966 INFO L82 PathProgramCache]: Analyzing trace with hash -291107904, now seen corresponding path program 407 times [2021-07-09 17:49:19,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:19,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273109914] [2021-07-09 17:49:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:49:20,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:20,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273109914] [2021-07-09 17:49:20,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273109914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:20,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901869262] [2021-07-09 17:49:20,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:20,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:49:20,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:20,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:20,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:20,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:20,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:20,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:49:20,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:20,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:20,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:20,644 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-07-09 17:49:20,645 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-07-09 17:49:20,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:20,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:20,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:20,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:20,723 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:20,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:20,728 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:20,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:20,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:20,797 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:20,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:20,801 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:20,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:20,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:49:20,865 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-07-09 17:49:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:21,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901869262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:21,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:21,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-09 17:49:21,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770876690] [2021-07-09 17:49:21,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:21,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:21,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:21,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:21,108 INFO L87 Difference]: Start difference. First operand 850 states and 2682 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:22,551 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-07-09 17:49:23,100 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2021-07-09 17:49:23,653 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-07-09 17:49:24,229 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2021-07-09 17:49:24,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:24,951 INFO L93 Difference]: Finished difference Result 1778 states and 5323 transitions. [2021-07-09 17:49:24,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:49:24,951 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:24,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:24,953 INFO L225 Difference]: With dead ends: 1778 [2021-07-09 17:49:24,953 INFO L226 Difference]: Without dead ends: 1438 [2021-07-09 17:49:24,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 3634.5ms TimeCoverageRelationStatistics Valid=539, Invalid=2653, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:49:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-07-09 17:49:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 848. [2021-07-09 17:49:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.1499409681227863) internal successors, (2668), 847 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2668 transitions. [2021-07-09 17:49:24,965 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2668 transitions. Word has length 25 [2021-07-09 17:49:24,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:24,966 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 2668 transitions. [2021-07-09 17:49:24,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2668 transitions. [2021-07-09 17:49:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:24,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:24,967 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:25,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9280,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:25,183 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:25,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:25,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1194779832, now seen corresponding path program 408 times [2021-07-09 17:49:25,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:25,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619194967] [2021-07-09 17:49:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:49:25,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:25,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619194967] [2021-07-09 17:49:25,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619194967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:25,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618369225] [2021-07-09 17:49:25,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:25,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:49:25,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:25,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:25,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:25,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:25,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:25,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:49:25,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:25,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:25,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:25,758 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-07-09 17:49:25,759 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-07-09 17:49:25,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:25,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:25,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:25,768 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:25,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:25,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:25,840 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:25,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:25,844 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:25,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:25,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:25,913 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:25,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:25,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:49:25,978 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-07-09 17:49:26,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:26,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:26,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:26,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:49:26,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:26,277 INFO L628 ElimStorePlain]: treesize reduction 23, result has 58.9 percent of original size [2021-07-09 17:49:26,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:26,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:26,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:26,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:49:26,292 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-07-09 17:49:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:26,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618369225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:26,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:26,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-09 17:49:26,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243144156] [2021-07-09 17:49:26,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:49:26,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:26,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:49:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:49:26,348 INFO L87 Difference]: Start difference. First operand 848 states and 2668 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:27,537 INFO L93 Difference]: Finished difference Result 1451 states and 4422 transitions. [2021-07-09 17:49:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:49:27,537 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:27,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:27,539 INFO L225 Difference]: With dead ends: 1451 [2021-07-09 17:49:27,539 INFO L226 Difference]: Without dead ends: 1313 [2021-07-09 17:49:27,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1110.4ms TimeCoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:49:27,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-07-09 17:49:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 828. [2021-07-09 17:49:27,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.1499395405078596) internal successors, (2605), 827 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2605 transitions. [2021-07-09 17:49:27,549 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2605 transitions. Word has length 25 [2021-07-09 17:49:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:27,550 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2605 transitions. [2021-07-09 17:49:27,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:27,550 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2605 transitions. [2021-07-09 17:49:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:27,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:27,551 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:27,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9304 [2021-07-09 17:49:27,765 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:27,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:27,765 INFO L82 PathProgramCache]: Analyzing trace with hash 902879914, now seen corresponding path program 409 times [2021-07-09 17:49:27,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:27,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803491937] [2021-07-09 17:49:27,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:49:27,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:27,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803491937] [2021-07-09 17:49:27,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803491937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:27,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512080715] [2021-07-09 17:49:27,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:27,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:27,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:28,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:28,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:28,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:49:28,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:28,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:28,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:28,329 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-07-09 17:49:28,330 INFO L628 ElimStorePlain]: treesize reduction 59, result has 68.4 percent of original size [2021-07-09 17:49:28,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:28,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:28,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:28,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:28,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:28,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:28,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:28,474 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:28,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:28,478 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:28,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:28,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:49:28,543 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-07-09 17:49:28,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:28,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:28,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:28,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:49:28,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:28,913 INFO L628 ElimStorePlain]: treesize reduction 65, result has 51.1 percent of original size [2021-07-09 17:49:28,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:28,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:28,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:28,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:28,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:28,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:28,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:28,990 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:29,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:29,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:49:29,021 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-07-09 17:49:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:29,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512080715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:29,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:29,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-09 17:49:29,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315691515] [2021-07-09 17:49:29,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:49:29,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:29,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:49:29,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:49:29,120 INFO L87 Difference]: Start difference. First operand 828 states and 2605 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:31,681 INFO L93 Difference]: Finished difference Result 1421 states and 4208 transitions. [2021-07-09 17:49:31,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:49:31,681 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:31,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:31,683 INFO L225 Difference]: With dead ends: 1421 [2021-07-09 17:49:31,683 INFO L226 Difference]: Without dead ends: 1233 [2021-07-09 17:49:31,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2221.0ms TimeCoverageRelationStatistics Valid=272, Invalid=1620, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:49:31,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-07-09 17:49:31,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 836. [2021-07-09 17:49:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.1580838323353295) internal successors, (2637), 835 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2637 transitions. [2021-07-09 17:49:31,694 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2637 transitions. Word has length 25 [2021-07-09 17:49:31,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:31,694 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2637 transitions. [2021-07-09 17:49:31,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:31,694 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2637 transitions. [2021-07-09 17:49:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:31,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:31,695 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:31,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9337 [2021-07-09 17:49:31,911 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:31,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1605652284, now seen corresponding path program 410 times [2021-07-09 17:49:31,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:31,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83510823] [2021-07-09 17:49:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:49:31,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:31,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83510823] [2021-07-09 17:49:31,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83510823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:31,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924844313] [2021-07-09 17:49:31,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:32,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:32,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:32,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:32,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:32,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:32,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:32,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:49:32,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:32,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:32,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:32,519 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-07-09 17:49:32,519 INFO L628 ElimStorePlain]: treesize reduction 29, result has 79.3 percent of original size [2021-07-09 17:49:32,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:32,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:32,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:32,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-07-09 17:49:32,585 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-07-09 17:49:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:32,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924844313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:32,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:32,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-09 17:49:32,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944289328] [2021-07-09 17:49:32,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:49:32,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:32,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:49:32,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:49:32,793 INFO L87 Difference]: Start difference. First operand 836 states and 2637 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:34,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:34,613 INFO L93 Difference]: Finished difference Result 1196 states and 3596 transitions. [2021-07-09 17:49:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:49:34,613 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:34,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:34,615 INFO L225 Difference]: With dead ends: 1196 [2021-07-09 17:49:34,615 INFO L226 Difference]: Without dead ends: 1046 [2021-07-09 17:49:34,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1681.4ms TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:49:34,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-07-09 17:49:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 826. [2021-07-09 17:49:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.1515151515151514) internal successors, (2600), 825 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2600 transitions. [2021-07-09 17:49:34,625 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2600 transitions. Word has length 25 [2021-07-09 17:49:34,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:34,625 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2600 transitions. [2021-07-09 17:49:34,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2600 transitions. [2021-07-09 17:49:34,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:34,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:34,626 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:34,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9374 [2021-07-09 17:49:34,842 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:34,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1175033238, now seen corresponding path program 411 times [2021-07-09 17:49:34,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:34,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789403617] [2021-07-09 17:49:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:49:34,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:34,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789403617] [2021-07-09 17:49:34,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789403617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:34,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832791492] [2021-07-09 17:49:34,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:35,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:49:35,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:35,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:35,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:35,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:35,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:35,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:35,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:49:35,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:35,435 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-07-09 17:49:35,435 INFO L628 ElimStorePlain]: treesize reduction 6, result has 95.1 percent of original size [2021-07-09 17:49:35,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:35,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:35,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:35,443 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:35,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:35,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-07-09 17:49:35,505 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-07-09 17:49:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:35,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832791492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:35,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:35,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-09 17:49:35,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484557870] [2021-07-09 17:49:35,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:49:35,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:35,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:49:35,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:49:35,710 INFO L87 Difference]: Start difference. First operand 826 states and 2600 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:36,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:36,953 INFO L93 Difference]: Finished difference Result 1043 states and 3193 transitions. [2021-07-09 17:49:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:49:36,953 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:36,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:36,954 INFO L225 Difference]: With dead ends: 1043 [2021-07-09 17:49:36,954 INFO L226 Difference]: Without dead ends: 894 [2021-07-09 17:49:36,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1168.3ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:49:36,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-07-09 17:49:36,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 803. [2021-07-09 17:49:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.1546134663341645) internal successors, (2530), 802 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2530 transitions. [2021-07-09 17:49:36,963 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2530 transitions. Word has length 25 [2021-07-09 17:49:36,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:36,963 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2530 transitions. [2021-07-09 17:49:36,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:36,963 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2530 transitions. [2021-07-09 17:49:36,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:36,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:36,964 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:37,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9395,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:37,180 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:37,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:37,181 INFO L82 PathProgramCache]: Analyzing trace with hash -171956220, now seen corresponding path program 412 times [2021-07-09 17:49:37,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:37,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828558648] [2021-07-09 17:49:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:49:37,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:37,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828558648] [2021-07-09 17:49:37,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828558648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:37,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848180567] [2021-07-09 17:49:37,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:37,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:37,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:37,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:37,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:37,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:37,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:37,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:49:37,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:37,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:37,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:37,628 INFO L628 ElimStorePlain]: treesize reduction 26, result has 78.7 percent of original size [2021-07-09 17:49:37,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:37,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:37,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:37,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-07-09 17:49:37,683 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:134, output treesize:85 [2021-07-09 17:49:37,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:37,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:37,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:49:37,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:37,920 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:49:37,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:37,950 INFO L628 ElimStorePlain]: treesize reduction 20, result has 61.5 percent of original size [2021-07-09 17:49:37,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:37,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:37,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:37,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:49:37,965 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-07-09 17:49:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:38,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848180567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:38,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:38,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-09 17:49:38,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998373538] [2021-07-09 17:49:38,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:49:38,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:38,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:49:38,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:38,017 INFO L87 Difference]: Start difference. First operand 803 states and 2530 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:39,105 INFO L93 Difference]: Finished difference Result 1281 states and 3847 transitions. [2021-07-09 17:49:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:49:39,105 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:39,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:39,107 INFO L225 Difference]: With dead ends: 1281 [2021-07-09 17:49:39,107 INFO L226 Difference]: Without dead ends: 1143 [2021-07-09 17:49:39,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 954.9ms TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:49:39,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-07-09 17:49:39,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 787. [2021-07-09 17:49:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.127226463104326) internal successors, (2458), 786 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2458 transitions. [2021-07-09 17:49:39,117 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2458 transitions. Word has length 25 [2021-07-09 17:49:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:39,117 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2458 transitions. [2021-07-09 17:49:39,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,117 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2458 transitions. [2021-07-09 17:49:39,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:39,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:39,118 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:39,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9419 [2021-07-09 17:49:39,335 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:39,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:39,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1513281842, now seen corresponding path program 413 times [2021-07-09 17:49:39,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:39,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269567976] [2021-07-09 17:49:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:49:39,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:39,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269567976] [2021-07-09 17:49:39,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269567976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:39,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161053753] [2021-07-09 17:49:39,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:39,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:49:39,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:39,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:39,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:39,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:39,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:39,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:49:39,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:39,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:39,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:39,840 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-07-09 17:49:39,840 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-07-09 17:49:39,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:39,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:39,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:39,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:39,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:39,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:39,923 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:39,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:39,927 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:39,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:39,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:39,996 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:40,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:40,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:49:40,062 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-07-09 17:49:40,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:40,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:40,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:40,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:49:40,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:40,437 INFO L628 ElimStorePlain]: treesize reduction 65, result has 51.1 percent of original size [2021-07-09 17:49:40,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:40,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:40,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:40,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:40,478 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:40,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:40,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:40,513 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:40,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:40,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:49:40,545 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-07-09 17:49:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:40,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161053753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:40,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:40,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-09 17:49:40,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328665297] [2021-07-09 17:49:40,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:49:40,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:40,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:49:40,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:40,635 INFO L87 Difference]: Start difference. First operand 787 states and 2458 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:43,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:43,025 INFO L93 Difference]: Finished difference Result 1327 states and 3926 transitions. [2021-07-09 17:49:43,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:49:43,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:43,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:43,027 INFO L225 Difference]: With dead ends: 1327 [2021-07-09 17:49:43,027 INFO L226 Difference]: Without dead ends: 1139 [2021-07-09 17:49:43,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2125.4ms TimeCoverageRelationStatistics Valid=311, Invalid=1759, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:49:43,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-07-09 17:49:43,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 785. [2021-07-09 17:49:43,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.128826530612245) internal successors, (2453), 784 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:43,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2453 transitions. [2021-07-09 17:49:43,037 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2453 transitions. Word has length 25 [2021-07-09 17:49:43,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:43,037 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2453 transitions. [2021-07-09 17:49:43,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:43,037 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2453 transitions. [2021-07-09 17:49:43,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:43,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:43,038 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:43,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9451 [2021-07-09 17:49:43,253 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:43,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1432505886, now seen corresponding path program 414 times [2021-07-09 17:49:43,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:43,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609623727] [2021-07-09 17:49:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:49:43,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:43,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609623727] [2021-07-09 17:49:43,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609623727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:43,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491721451] [2021-07-09 17:49:43,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:43,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:49:43,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:43,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:43,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:43,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:43,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:43,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:43,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:49:43,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:43,924 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-07-09 17:49:43,925 INFO L628 ElimStorePlain]: treesize reduction 38, result has 79.9 percent of original size [2021-07-09 17:49:43,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:43,930 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:43,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:43,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:44,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:44,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:44,014 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:44,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:44,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:44,093 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:44,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:44,097 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:44,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:44,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:49:44,173 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:223, output treesize:132 [2021-07-09 17:49:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:44,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491721451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:44,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:44,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-09 17:49:44,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051317893] [2021-07-09 17:49:44,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:49:44,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:44,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:49:44,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:44,368 INFO L87 Difference]: Start difference. First operand 785 states and 2453 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:45,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:45,603 INFO L93 Difference]: Finished difference Result 969 states and 2958 transitions. [2021-07-09 17:49:45,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:49:45,603 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:45,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:45,605 INFO L225 Difference]: With dead ends: 969 [2021-07-09 17:49:45,605 INFO L226 Difference]: Without dead ends: 828 [2021-07-09 17:49:45,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1235.3ms TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:49:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-07-09 17:49:45,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 723. [2021-07-09 17:49:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.149584487534626) internal successors, (2274), 722 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2274 transitions. [2021-07-09 17:49:45,613 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2274 transitions. Word has length 25 [2021-07-09 17:49:45,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:45,613 INFO L482 AbstractCegarLoop]: Abstraction has 723 states and 2274 transitions. [2021-07-09 17:49:45,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2274 transitions. [2021-07-09 17:49:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:45,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:45,614 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:45,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9487,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:45,830 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:45,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:45,831 INFO L82 PathProgramCache]: Analyzing trace with hash 993588152, now seen corresponding path program 415 times [2021-07-09 17:49:45,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:45,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059240841] [2021-07-09 17:49:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:49:45,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:45,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059240841] [2021-07-09 17:49:45,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059240841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:45,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769210836] [2021-07-09 17:49:45,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:46,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:46,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:46,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:46,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:46,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:49:46,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:46,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:46,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:46,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:49:46,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:46,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:46,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:46,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:46,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:46,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:49:46,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:46,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:46,172 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:46,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:46,175 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:46,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:49:46,177 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:46,179 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:49:46,179 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:46,237 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.3 percent of original size [2021-07-09 17:49:46,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:49:46,239 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:199, output treesize:66 [2021-07-09 17:49:46,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:46,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:46,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:49:46,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:46,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:46,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:46,484 INFO L628 ElimStorePlain]: treesize reduction 23, result has 58.9 percent of original size [2021-07-09 17:49:46,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:46,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:46,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:46,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:49:46,498 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-07-09 17:49:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:46,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769210836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:46,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:46,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-09 17:49:46,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840095769] [2021-07-09 17:49:46,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:49:46,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:46,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:49:46,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:46,540 INFO L87 Difference]: Start difference. First operand 723 states and 2274 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:47,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:47,419 INFO L93 Difference]: Finished difference Result 1403 states and 4198 transitions. [2021-07-09 17:49:47,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:49:47,419 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:47,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:47,421 INFO L225 Difference]: With dead ends: 1403 [2021-07-09 17:49:47,421 INFO L226 Difference]: Without dead ends: 1265 [2021-07-09 17:49:47,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 729.0ms TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:49:47,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-07-09 17:49:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 749. [2021-07-09 17:49:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.18048128342246) internal successors, (2379), 748 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2379 transitions. [2021-07-09 17:49:47,431 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2379 transitions. Word has length 25 [2021-07-09 17:49:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:47,431 INFO L482 AbstractCegarLoop]: Abstraction has 749 states and 2379 transitions. [2021-07-09 17:49:47,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2379 transitions. [2021-07-09 17:49:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:47,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:47,432 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:47,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9510 [2021-07-09 17:49:47,633 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:47,634 INFO L82 PathProgramCache]: Analyzing trace with hash 701688234, now seen corresponding path program 416 times [2021-07-09 17:49:47,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:47,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377791232] [2021-07-09 17:49:47,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:49:47,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:47,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377791232] [2021-07-09 17:49:47,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377791232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:47,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931489646] [2021-07-09 17:49:47,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:47,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:47,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:47,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:47,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:48,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:48,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:48,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:49:48,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:48,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:48,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:48,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:48,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:48,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:48,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:48,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:49:48,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:48,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:48,031 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:48,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:48,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:48,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:49:48,035 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:48,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:48,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:48,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:49:48,038 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:48,040 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:49:48,041 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:48,102 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.3 percent of original size [2021-07-09 17:49:48,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:49:48,105 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:199, output treesize:66 [2021-07-09 17:49:48,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:48,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:48,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:49:48,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:48,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:49:48,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:48,405 INFO L628 ElimStorePlain]: treesize reduction 42, result has 56.7 percent of original size [2021-07-09 17:49:48,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:48,408 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:48,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:48,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:48,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:48,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:48,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:49:48,461 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:24 [2021-07-09 17:49:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:48,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931489646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:48,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:48,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-09 17:49:48,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279122824] [2021-07-09 17:49:48,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:49:48,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:48,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:49:48,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:49:48,542 INFO L87 Difference]: Start difference. First operand 749 states and 2379 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:50,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:50,146 INFO L93 Difference]: Finished difference Result 1358 states and 4055 transitions. [2021-07-09 17:49:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:49:50,147 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:50,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:50,148 INFO L225 Difference]: With dead ends: 1358 [2021-07-09 17:49:50,148 INFO L226 Difference]: Without dead ends: 1170 [2021-07-09 17:49:50,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1457.1ms TimeCoverageRelationStatistics Valid=238, Invalid=1244, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:49:50,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-07-09 17:49:50,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 772. [2021-07-09 17:49:50,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.1647211413748377) internal successors, (2440), 771 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2440 transitions. [2021-07-09 17:49:50,158 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2440 transitions. Word has length 25 [2021-07-09 17:49:50,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:50,159 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2440 transitions. [2021-07-09 17:49:50,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:50,159 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2440 transitions. [2021-07-09 17:49:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:50,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:50,160 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:50,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9563,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:50,375 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:50,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:50,375 INFO L82 PathProgramCache]: Analyzing trace with hash -140970944, now seen corresponding path program 417 times [2021-07-09 17:49:50,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:50,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158618793] [2021-07-09 17:49:50,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:49:50,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:50,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158618793] [2021-07-09 17:49:50,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158618793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:50,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432829164] [2021-07-09 17:49:50,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:50,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:49:50,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:50,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:49:50,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:50,833 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_2, v_prenex_469], 1=[ends_with_6]} [2021-07-09 17:49:50,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:50,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:50,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:50,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:50,841 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:49:50,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:50,875 INFO L628 ElimStorePlain]: treesize reduction 35, result has 53.3 percent of original size [2021-07-09 17:49:50,875 INFO L518 ElimStorePlain]: Eliminatee v_prenex_469 vanished before elimination [2021-07-09 17:49:50,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:50,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:50,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:50,880 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:50,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:50,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:49:50,893 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:111, output treesize:16 [2021-07-09 17:49:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:49:50,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432829164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:50,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:50,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-07-09 17:49:50,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098686316] [2021-07-09 17:49:50,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:49:50,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:50,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:49:50,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:49:50,937 INFO L87 Difference]: Start difference. First operand 772 states and 2440 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:51,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:51,186 INFO L93 Difference]: Finished difference Result 1021 states and 3122 transitions. [2021-07-09 17:49:51,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:49:51,186 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:51,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:51,187 INFO L225 Difference]: With dead ends: 1021 [2021-07-09 17:49:51,187 INFO L226 Difference]: Without dead ends: 944 [2021-07-09 17:49:51,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:49:51,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-07-09 17:49:51,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 737. [2021-07-09 17:49:51,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.150815217391304) internal successors, (2319), 736 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:51,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2319 transitions. [2021-07-09 17:49:51,196 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2319 transitions. Word has length 25 [2021-07-09 17:49:51,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:51,196 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2319 transitions. [2021-07-09 17:49:51,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:51,196 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2319 transitions. [2021-07-09 17:49:51,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:51,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:51,197 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:51,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9628 [2021-07-09 17:49:51,413 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:51,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:51,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1392871288, now seen corresponding path program 418 times [2021-07-09 17:49:51,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:51,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078650256] [2021-07-09 17:49:51,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:49:51,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:51,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078650256] [2021-07-09 17:49:51,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078650256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:51,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346830717] [2021-07-09 17:49:51,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:51,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:51,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:51,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:51,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:51,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:51,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:51,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:49:51,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:51,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:51,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:51,901 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-07-09 17:49:51,902 INFO L628 ElimStorePlain]: treesize reduction 26, result has 78.7 percent of original size [2021-07-09 17:49:51,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:51,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:51,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:51,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-07-09 17:49:51,958 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:134, output treesize:85 [2021-07-09 17:49:52,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:52,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:52,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:49:52,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:52,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:52,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:52,271 INFO L628 ElimStorePlain]: treesize reduction 45, result has 55.4 percent of original size [2021-07-09 17:49:52,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:52,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:52,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:52,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:52,297 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:52,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:52,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:49:52,317 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:24 [2021-07-09 17:49:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:52,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346830717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:52,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:52,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-09 17:49:52,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000100370] [2021-07-09 17:49:52,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:49:52,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:52,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:49:52,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:49:52,390 INFO L87 Difference]: Start difference. First operand 737 states and 2319 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:55,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:55,185 INFO L93 Difference]: Finished difference Result 1363 states and 4012 transitions. [2021-07-09 17:49:55,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:49:55,186 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:55,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:55,187 INFO L225 Difference]: With dead ends: 1363 [2021-07-09 17:49:55,188 INFO L226 Difference]: Without dead ends: 1152 [2021-07-09 17:49:55,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 2440.3ms TimeCoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:49:55,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-07-09 17:49:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 727. [2021-07-09 17:49:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.1349862258953167) internal successors, (2276), 726 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2276 transitions. [2021-07-09 17:49:55,197 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2276 transitions. Word has length 25 [2021-07-09 17:49:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:55,197 INFO L482 AbstractCegarLoop]: Abstraction has 727 states and 2276 transitions. [2021-07-09 17:49:55,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2276 transitions. [2021-07-09 17:49:55,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:55,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:55,198 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:55,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9682 [2021-07-09 17:49:55,398 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:55,398 INFO L82 PathProgramCache]: Analyzing trace with hash -378991928, now seen corresponding path program 419 times [2021-07-09 17:49:55,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:55,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652125228] [2021-07-09 17:49:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:49:55,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:55,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652125228] [2021-07-09 17:49:55,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652125228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:55,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22953839] [2021-07-09 17:49:55,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:55,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:49:55,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:55,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:55,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:55,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:55,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:55,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:49:55,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:55,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:55,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:56,001 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-07-09 17:49:56,001 INFO L628 ElimStorePlain]: treesize reduction 6, result has 95.1 percent of original size [2021-07-09 17:49:56,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:56,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:56,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:56,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:56,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:56,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-07-09 17:49:56,068 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-07-09 17:49:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:56,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22953839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:56,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:56,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:49:56,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910415578] [2021-07-09 17:49:56,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:49:56,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:56,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:49:56,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:49:56,324 INFO L87 Difference]: Start difference. First operand 727 states and 2276 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:57,651 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-07-09 17:49:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:57,972 INFO L93 Difference]: Finished difference Result 1041 states and 3141 transitions. [2021-07-09 17:49:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:49:57,973 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:49:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:57,974 INFO L225 Difference]: With dead ends: 1041 [2021-07-09 17:49:57,974 INFO L226 Difference]: Without dead ends: 835 [2021-07-09 17:49:57,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1553.0ms TimeCoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:49:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-07-09 17:49:57,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 710. [2021-07-09 17:49:57,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 3.1255289139633287) internal successors, (2216), 709 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:57,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2216 transitions. [2021-07-09 17:49:57,982 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2216 transitions. Word has length 25 [2021-07-09 17:49:57,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:57,982 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2216 transitions. [2021-07-09 17:49:57,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:57,982 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2216 transitions. [2021-07-09 17:49:57,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:49:57,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:57,983 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:58,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9714,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:58,199 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:58,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:58,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1252021142, now seen corresponding path program 420 times [2021-07-09 17:49:58,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:58,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280069788] [2021-07-09 17:49:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:49:58,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:58,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280069788] [2021-07-09 17:49:58,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280069788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:58,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617894389] [2021-07-09 17:49:58,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:58,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:49:58,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:58,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:49:58,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:58,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:58,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:58,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:49:58,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:58,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:58,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:58,745 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-09 17:49:58,746 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-07-09 17:49:58,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:58,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:58,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:58,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:58,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:58,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:58,818 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:58,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:58,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:58,874 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:58,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:58,877 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:58,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:58,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:49:58,929 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-07-09 17:49:59,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:49:59,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:59,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:49:59,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:49:59,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:59,205 INFO L628 ElimStorePlain]: treesize reduction 35, result has 47.8 percent of original size [2021-07-09 17:49:59,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:49:59,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:49:59,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:49:59,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:49:59,223 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-07-09 17:49:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:59,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617894389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:59,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:59,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-09 17:49:59,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173184572] [2021-07-09 17:49:59,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:59,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:59,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:59,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:59,281 INFO L87 Difference]: Start difference. First operand 710 states and 2216 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:00,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:00,325 INFO L93 Difference]: Finished difference Result 1210 states and 3620 transitions. [2021-07-09 17:50:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:50:00,325 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:00,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:00,327 INFO L225 Difference]: With dead ends: 1210 [2021-07-09 17:50:00,327 INFO L226 Difference]: Without dead ends: 1072 [2021-07-09 17:50:00,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 971.3ms TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:50:00,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-07-09 17:50:00,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 740. [2021-07-09 17:50:00,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.1407307171853858) internal successors, (2321), 739 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:00,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2321 transitions. [2021-07-09 17:50:00,337 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2321 transitions. Word has length 25 [2021-07-09 17:50:00,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:00,337 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2321 transitions. [2021-07-09 17:50:00,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:00,337 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2321 transitions. [2021-07-09 17:50:00,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:00,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:00,338 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:00,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9737,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:00,538 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:00,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:00,539 INFO L82 PathProgramCache]: Analyzing trace with hash 960121224, now seen corresponding path program 421 times [2021-07-09 17:50:00,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:00,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601438408] [2021-07-09 17:50:00,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:50:00,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:00,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601438408] [2021-07-09 17:50:00,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601438408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:00,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598025221] [2021-07-09 17:50:00,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:00,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:00,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:00,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:00,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:00,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:00,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:00,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:01,037 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-07-09 17:50:01,037 INFO L628 ElimStorePlain]: treesize reduction 26, result has 78.7 percent of original size [2021-07-09 17:50:01,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:50:01,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:01,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:01,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-07-09 17:50:01,096 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:134, output treesize:85 [2021-07-09 17:50:01,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:01,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:01,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:01,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:01,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:01,423 INFO L628 ElimStorePlain]: treesize reduction 57, result has 49.1 percent of original size [2021-07-09 17:50:01,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:01,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:01,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:01,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:50:01,457 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:01,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:01,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:50:01,483 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:24 [2021-07-09 17:50:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:01,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598025221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:01,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:01,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-09 17:50:01,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258454195] [2021-07-09 17:50:01,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:50:01,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:01,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:50:01,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:01,574 INFO L87 Difference]: Start difference. First operand 740 states and 2321 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:03,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:03,952 INFO L93 Difference]: Finished difference Result 1318 states and 3886 transitions. [2021-07-09 17:50:03,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:50:03,952 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:03,954 INFO L225 Difference]: With dead ends: 1318 [2021-07-09 17:50:03,954 INFO L226 Difference]: Without dead ends: 1130 [2021-07-09 17:50:03,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2022.6ms TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:50:03,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-07-09 17:50:03,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 736. [2021-07-09 17:50:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.1333333333333333) internal successors, (2303), 735 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2303 transitions. [2021-07-09 17:50:03,963 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2303 transitions. Word has length 25 [2021-07-09 17:50:03,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:03,964 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2303 transitions. [2021-07-09 17:50:03,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2303 transitions. [2021-07-09 17:50:03,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:03,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:03,965 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:04,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9765 [2021-07-09 17:50:04,180 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:04,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:04,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1662893594, now seen corresponding path program 422 times [2021-07-09 17:50:04,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:04,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740422071] [2021-07-09 17:50:04,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:50:04,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:04,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740422071] [2021-07-09 17:50:04,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740422071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:04,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909896617] [2021-07-09 17:50:04,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:04,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:04,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:04,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:04,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:04,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:04,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:04,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:04,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:04,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:04,880 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-07-09 17:50:04,880 INFO L628 ElimStorePlain]: treesize reduction 65, result has 69.2 percent of original size [2021-07-09 17:50:04,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:50:04,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:04,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:04,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:04,966 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:04,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:04,970 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:05,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:05,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:50:05,048 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:05,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:05,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-07-09 17:50:05,124 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:223, output treesize:132 [2021-07-09 17:50:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:05,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909896617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:05,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:05,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-09 17:50:05,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84473885] [2021-07-09 17:50:05,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:50:05,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:05,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:50:05,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:05,338 INFO L87 Difference]: Start difference. First operand 736 states and 2303 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:06,538 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2021-07-09 17:50:06,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:06,773 INFO L93 Difference]: Finished difference Result 979 states and 2967 transitions. [2021-07-09 17:50:06,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:50:06,773 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:06,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:06,774 INFO L225 Difference]: With dead ends: 979 [2021-07-09 17:50:06,774 INFO L226 Difference]: Without dead ends: 820 [2021-07-09 17:50:06,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1364.8ms TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:50:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-07-09 17:50:06,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 728. [2021-07-09 17:50:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 3.123796423658872) internal successors, (2271), 727 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 2271 transitions. [2021-07-09 17:50:06,782 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 2271 transitions. Word has length 25 [2021-07-09 17:50:06,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:06,783 INFO L482 AbstractCegarLoop]: Abstraction has 728 states and 2271 transitions. [2021-07-09 17:50:06,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:06,783 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 2271 transitions. [2021-07-09 17:50:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:06,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:06,783 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:06,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9798,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:07,000 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:07,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:07,000 INFO L82 PathProgramCache]: Analyzing trace with hash 440427534, now seen corresponding path program 423 times [2021-07-09 17:50:07,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:07,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714652408] [2021-07-09 17:50:07,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:50:07,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:07,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714652408] [2021-07-09 17:50:07,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714652408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:07,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921782200] [2021-07-09 17:50:07,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:07,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:50:07,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:07,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:07,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:07,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:07,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:07,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:07,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:07,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:50:07,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:07,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:07,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:07,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:07,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:07,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:07,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:07,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:50:07,429 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:07,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:50:07,432 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:07,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:07,434 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:07,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:50:07,437 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:07,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:07,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:07,440 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:07,497 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.3 percent of original size [2021-07-09 17:50:07,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:50:07,499 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:199, output treesize:66 [2021-07-09 17:50:07,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:50:07,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:07,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:07,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:50:07,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:07,720 INFO L628 ElimStorePlain]: treesize reduction 23, result has 58.9 percent of original size [2021-07-09 17:50:07,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:07,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:07,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:07,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:50:07,737 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-07-09 17:50:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:07,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921782200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:07,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:07,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-09 17:50:07,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588145477] [2021-07-09 17:50:07,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:50:07,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:07,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:50:07,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:07,792 INFO L87 Difference]: Start difference. First operand 728 states and 2271 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:08,933 INFO L93 Difference]: Finished difference Result 1373 states and 4092 transitions. [2021-07-09 17:50:08,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:50:08,934 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:08,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:08,936 INFO L225 Difference]: With dead ends: 1373 [2021-07-09 17:50:08,936 INFO L226 Difference]: Without dead ends: 1235 [2021-07-09 17:50:08,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 942.2ms TimeCoverageRelationStatistics Valid=242, Invalid=1240, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:50:08,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-07-09 17:50:08,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 760. [2021-07-09 17:50:08,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.1633728590250327) internal successors, (2401), 759 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:08,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2401 transitions. [2021-07-09 17:50:08,946 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2401 transitions. Word has length 25 [2021-07-09 17:50:08,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:08,946 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2401 transitions. [2021-07-09 17:50:08,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:08,946 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2401 transitions. [2021-07-09 17:50:08,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:08,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:08,947 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:09,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9821 [2021-07-09 17:50:09,148 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:09,148 INFO L82 PathProgramCache]: Analyzing trace with hash 148527616, now seen corresponding path program 424 times [2021-07-09 17:50:09,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:09,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823673482] [2021-07-09 17:50:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:50:09,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:09,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823673482] [2021-07-09 17:50:09,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823673482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:09,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815666102] [2021-07-09 17:50:09,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:09,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:09,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:09,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:09,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:09,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:09,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:09,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:50:09,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:09,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:09,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:09,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:09,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:09,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:09,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:09,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:09,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:09,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:50:09,560 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:09,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:09,563 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:09,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:50:09,566 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:09,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:50:09,569 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:09,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:50:09,572 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:09,635 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.3 percent of original size [2021-07-09 17:50:09,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:50:09,637 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:199, output treesize:66 [2021-07-09 17:50:09,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:09,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:09,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:09,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:09,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:09,910 INFO L628 ElimStorePlain]: treesize reduction 57, result has 49.1 percent of original size [2021-07-09 17:50:09,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:50:09,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:09,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:09,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:09,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:09,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:09,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:50:09,969 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:24 [2021-07-09 17:50:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:10,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815666102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:10,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:10,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-09 17:50:10,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075297522] [2021-07-09 17:50:10,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:50:10,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:10,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:50:10,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:10,054 INFO L87 Difference]: Start difference. First operand 760 states and 2401 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:11,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:11,751 INFO L93 Difference]: Finished difference Result 1333 states and 3967 transitions. [2021-07-09 17:50:11,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:50:11,751 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:11,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:11,753 INFO L225 Difference]: With dead ends: 1333 [2021-07-09 17:50:11,753 INFO L226 Difference]: Without dead ends: 1145 [2021-07-09 17:50:11,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1532.4ms TimeCoverageRelationStatistics Valid=251, Invalid=1471, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:50:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-07-09 17:50:11,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 777. [2021-07-09 17:50:11,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.140463917525773) internal successors, (2437), 776 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:11,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2437 transitions. [2021-07-09 17:50:11,763 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2437 transitions. Word has length 25 [2021-07-09 17:50:11,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:11,763 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2437 transitions. [2021-07-09 17:50:11,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:11,763 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2437 transitions. [2021-07-09 17:50:11,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:11,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:11,764 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:11,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9885,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:11,981 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:11,981 INFO L82 PathProgramCache]: Analyzing trace with hash -694131562, now seen corresponding path program 425 times [2021-07-09 17:50:11,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:11,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369389449] [2021-07-09 17:50:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:50:12,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:12,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369389449] [2021-07-09 17:50:12,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369389449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:12,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727218891] [2021-07-09 17:50:12,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:12,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:50:12,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:12,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:12,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:12,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:12,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:12,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:12,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:12,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:12,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:12,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:50:12,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:12,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:12,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:12,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:12,388 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:12,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:50:12,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:12,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:12,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:50:12,408 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:114, output treesize:43 [2021-07-09 17:50:12,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:12,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:12,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:12,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:12,554 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:50:12,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:12,581 INFO L628 ElimStorePlain]: treesize reduction 20, result has 61.5 percent of original size [2021-07-09 17:50:12,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:50:12,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:12,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:12,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:50:12,595 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-07-09 17:50:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:12,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727218891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:12,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:12,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-09 17:50:12,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474144144] [2021-07-09 17:50:12,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:50:12,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:12,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:50:12,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:12,637 INFO L87 Difference]: Start difference. First operand 777 states and 2437 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:13,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:13,417 INFO L93 Difference]: Finished difference Result 1102 states and 3318 transitions. [2021-07-09 17:50:13,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:50:13,417 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:13,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:13,419 INFO L225 Difference]: With dead ends: 1102 [2021-07-09 17:50:13,419 INFO L226 Difference]: Without dead ends: 964 [2021-07-09 17:50:13,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 709.8ms TimeCoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:50:13,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-07-09 17:50:13,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 719. [2021-07-09 17:50:13,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.1239554317548746) internal successors, (2243), 718 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:13,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2243 transitions. [2021-07-09 17:50:13,427 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2243 transitions. Word has length 25 [2021-07-09 17:50:13,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:13,428 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 2243 transitions. [2021-07-09 17:50:13,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:13,428 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2243 transitions. [2021-07-09 17:50:13,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:13,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:13,429 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:13,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9936 [2021-07-09 17:50:13,629 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:13,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:13,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1050829462, now seen corresponding path program 426 times [2021-07-09 17:50:13,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:13,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638619710] [2021-07-09 17:50:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:50:13,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:13,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638619710] [2021-07-09 17:50:13,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638619710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:13,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322064866] [2021-07-09 17:50:13,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:13,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:50:13,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:13,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:13,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:13,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:13,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:13,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:50:13,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:13,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:13,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:13,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:13,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:13,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:13,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:50:13,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:14,019 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.6 percent of original size [2021-07-09 17:50:14,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:50:14,022 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:132, output treesize:66 [2021-07-09 17:50:14,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:14,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:14,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:14,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:14,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:14,287 INFO L628 ElimStorePlain]: treesize reduction 35, result has 47.8 percent of original size [2021-07-09 17:50:14,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:50:14,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:14,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:14,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:50:14,302 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-07-09 17:50:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:14,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322064866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:14,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:14,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-09 17:50:14,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679194640] [2021-07-09 17:50:14,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:50:14,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:14,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:50:14,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:50:14,354 INFO L87 Difference]: Start difference. First operand 719 states and 2243 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:15,367 INFO L93 Difference]: Finished difference Result 1367 states and 4077 transitions. [2021-07-09 17:50:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:50:15,367 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:15,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:15,369 INFO L225 Difference]: With dead ends: 1367 [2021-07-09 17:50:15,369 INFO L226 Difference]: Without dead ends: 1229 [2021-07-09 17:50:15,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 940.8ms TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:50:15,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-07-09 17:50:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 769. [2021-07-09 17:50:15,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.171875) internal successors, (2436), 768 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:15,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2436 transitions. [2021-07-09 17:50:15,379 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2436 transitions. Word has length 25 [2021-07-09 17:50:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:15,379 INFO L482 AbstractCegarLoop]: Abstraction has 769 states and 2436 transitions. [2021-07-09 17:50:15,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2436 transitions. [2021-07-09 17:50:15,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:15,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:15,380 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:15,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9979,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:15,581 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:15,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:15,581 INFO L82 PathProgramCache]: Analyzing trace with hash 758929544, now seen corresponding path program 427 times [2021-07-09 17:50:15,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:15,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547519282] [2021-07-09 17:50:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:50:15,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:15,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547519282] [2021-07-09 17:50:15,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547519282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:15,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286501446] [2021-07-09 17:50:15,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:15,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:15,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:15,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:15,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:15,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:15,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:15,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:15,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:15,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:15,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:15,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:50:15,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:15,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:15,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:15,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:15,988 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:15,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:15,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:15,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:50:15,992 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:15,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:50:15,994 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:15,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:50:15,996 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:16,059 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.3 percent of original size [2021-07-09 17:50:16,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-09 17:50:16,061 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:199, output treesize:66 [2021-07-09 17:50:16,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:16,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:16,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:50:16,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:16,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:50:16,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:16,351 INFO L628 ElimStorePlain]: treesize reduction 45, result has 55.4 percent of original size [2021-07-09 17:50:16,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:16,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:16,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:16,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:16,383 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:16,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:16,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:50:16,409 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:24 [2021-07-09 17:50:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:16,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286501446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:16,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:16,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 17:50:16,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206898965] [2021-07-09 17:50:16,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:50:16,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:16,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:50:16,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:50:16,500 INFO L87 Difference]: Start difference. First operand 769 states and 2436 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:18,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:18,545 INFO L93 Difference]: Finished difference Result 1528 states and 4525 transitions. [2021-07-09 17:50:18,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:50:18,545 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:18,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:18,547 INFO L225 Difference]: With dead ends: 1528 [2021-07-09 17:50:18,547 INFO L226 Difference]: Without dead ends: 1274 [2021-07-09 17:50:18,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1868.8ms TimeCoverageRelationStatistics Valid=318, Invalid=1752, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:50:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-07-09 17:50:18,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 786. [2021-07-09 17:50:18,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.1490445859872613) internal successors, (2472), 785 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:18,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2472 transitions. [2021-07-09 17:50:18,558 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2472 transitions. Word has length 25 [2021-07-09 17:50:18,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:18,558 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 2472 transitions. [2021-07-09 17:50:18,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:18,558 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2472 transitions. [2021-07-09 17:50:18,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:18,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:18,559 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:18,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10025 [2021-07-09 17:50:18,775 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:18,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:18,775 INFO L82 PathProgramCache]: Analyzing trace with hash -83729634, now seen corresponding path program 428 times [2021-07-09 17:50:18,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:18,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958975184] [2021-07-09 17:50:18,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:50:18,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:18,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958975184] [2021-07-09 17:50:18,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958975184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:18,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728573137] [2021-07-09 17:50:18,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:18,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:18,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:18,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:18,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:19,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:19,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:19,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:50:19,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:19,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:19,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:19,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:19,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:19,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:50:19,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:19,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:19,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:19,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:19,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:19,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:50:19,162 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:114, output treesize:43 [2021-07-09 17:50:19,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:19,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:19,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:19,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:19,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:50:19,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:19,363 INFO L628 ElimStorePlain]: treesize reduction 20, result has 61.5 percent of original size [2021-07-09 17:50:19,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:50:19,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:19,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:19,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:50:19,377 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-07-09 17:50:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:19,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728573137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:19,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:19,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-09 17:50:19,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593273202] [2021-07-09 17:50:19,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:50:19,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:19,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:50:19,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:50:19,427 INFO L87 Difference]: Start difference. First operand 786 states and 2472 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:20,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:20,319 INFO L93 Difference]: Finished difference Result 1105 states and 3338 transitions. [2021-07-09 17:50:20,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:50:20,319 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:20,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:20,321 INFO L225 Difference]: With dead ends: 1105 [2021-07-09 17:50:20,321 INFO L226 Difference]: Without dead ends: 967 [2021-07-09 17:50:20,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 796.6ms TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:50:20,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-07-09 17:50:20,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 777. [2021-07-09 17:50:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.149484536082474) internal successors, (2444), 776 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:20,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2444 transitions. [2021-07-09 17:50:20,332 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2444 transitions. Word has length 25 [2021-07-09 17:50:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:20,332 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2444 transitions. [2021-07-09 17:50:20,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2444 transitions. [2021-07-09 17:50:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:20,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:20,333 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:20,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10075,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:20,550 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:20,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:20,550 INFO L82 PathProgramCache]: Analyzing trace with hash -895323242, now seen corresponding path program 429 times [2021-07-09 17:50:20,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:20,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748046086] [2021-07-09 17:50:20,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:50:20,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:20,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748046086] [2021-07-09 17:50:20,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748046086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:20,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467470642] [2021-07-09 17:50:20,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:20,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:50:20,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:20,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:20,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:20,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:20,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:20,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:20,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:20,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:20,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:20,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:50:20,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:20,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:20,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:20,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:20,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:20,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:50:20,894 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:20,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:20,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:50:20,913 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:114, output treesize:43 [2021-07-09 17:50:21,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:50:21,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:21,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:21,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:50:21,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:21,113 INFO L628 ElimStorePlain]: treesize reduction 23, result has 58.9 percent of original size [2021-07-09 17:50:21,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:21,115 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:21,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:21,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:50:21,127 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-07-09 17:50:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:21,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467470642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:21,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:21,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-07-09 17:50:21,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568531298] [2021-07-09 17:50:21,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:50:21,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:21,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:50:21,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:50:21,171 INFO L87 Difference]: Start difference. First operand 777 states and 2444 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:21,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:21,978 INFO L93 Difference]: Finished difference Result 1057 states and 3189 transitions. [2021-07-09 17:50:21,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:50:21,978 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:21,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:21,980 INFO L225 Difference]: With dead ends: 1057 [2021-07-09 17:50:21,980 INFO L226 Difference]: Without dead ends: 919 [2021-07-09 17:50:21,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 730.4ms TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:50:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-07-09 17:50:21,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 743. [2021-07-09 17:50:21,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.128032345013477) internal successors, (2321), 742 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:21,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2321 transitions. [2021-07-09 17:50:21,988 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2321 transitions. Word has length 25 [2021-07-09 17:50:21,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:21,988 INFO L482 AbstractCegarLoop]: Abstraction has 743 states and 2321 transitions. [2021-07-09 17:50:21,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2321 transitions. [2021-07-09 17:50:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:21,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:21,989 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:22,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10114 [2021-07-09 17:50:22,190 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:22,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:22,190 INFO L82 PathProgramCache]: Analyzing trace with hash -200774392, now seen corresponding path program 430 times [2021-07-09 17:50:22,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:22,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847106238] [2021-07-09 17:50:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:50:22,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:22,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847106238] [2021-07-09 17:50:22,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847106238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:22,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331042833] [2021-07-09 17:50:22,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:22,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:22,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:22,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:22,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:22,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:22,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:22,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:22,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:22,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:22,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:22,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:22,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:50:22,539 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:28 [2021-07-09 17:50:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:22,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331042833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:22,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:22,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-09 17:50:22,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079981076] [2021-07-09 17:50:22,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:50:22,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:22,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:50:22,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:22,672 INFO L87 Difference]: Start difference. First operand 743 states and 2321 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:23,954 INFO L93 Difference]: Finished difference Result 1449 states and 4330 transitions. [2021-07-09 17:50:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:50:23,954 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:23,956 INFO L225 Difference]: With dead ends: 1449 [2021-07-09 17:50:23,956 INFO L226 Difference]: Without dead ends: 1311 [2021-07-09 17:50:23,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 837.1ms TimeCoverageRelationStatistics Valid=459, Invalid=2297, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:50:23,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-07-09 17:50:23,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 743. [2021-07-09 17:50:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.128032345013477) internal successors, (2321), 742 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2321 transitions. [2021-07-09 17:50:23,967 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2321 transitions. Word has length 25 [2021-07-09 17:50:23,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:23,967 INFO L482 AbstractCegarLoop]: Abstraction has 743 states and 2321 transitions. [2021-07-09 17:50:23,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:23,967 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2321 transitions. [2021-07-09 17:50:23,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:23,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:23,968 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:24,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10152,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:24,172 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:24,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:24,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1084112274, now seen corresponding path program 431 times [2021-07-09 17:50:24,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:24,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225269786] [2021-07-09 17:50:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:50:24,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:24,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225269786] [2021-07-09 17:50:24,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225269786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:24,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383649927] [2021-07-09 17:50:24,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:24,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:50:24,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:24,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:24,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:24,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:24,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:24,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:24,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:24,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:24,537 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.9 percent of original size [2021-07-09 17:50:24,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-07-09 17:50:24,539 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:37 [2021-07-09 17:50:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:24,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383649927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:24,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:24,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-09 17:50:24,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349753689] [2021-07-09 17:50:24,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:50:24,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:24,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:50:24,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:24,811 INFO L87 Difference]: Start difference. First operand 743 states and 2321 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:26,880 INFO L93 Difference]: Finished difference Result 2240 states and 6645 transitions. [2021-07-09 17:50:26,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 17:50:26,881 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:26,884 INFO L225 Difference]: With dead ends: 2240 [2021-07-09 17:50:26,884 INFO L226 Difference]: Without dead ends: 2102 [2021-07-09 17:50:26,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1496.0ms TimeCoverageRelationStatistics Valid=559, Invalid=2981, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:50:26,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-07-09 17:50:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 793. [2021-07-09 17:50:26,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.1742424242424243) internal successors, (2514), 792 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2514 transitions. [2021-07-09 17:50:26,899 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2514 transitions. Word has length 25 [2021-07-09 17:50:26,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:26,899 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2514 transitions. [2021-07-09 17:50:26,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:26,899 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2514 transitions. [2021-07-09 17:50:26,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:26,900 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:26,900 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:27,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10163,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:27,113 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:27,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:27,113 INFO L82 PathProgramCache]: Analyzing trace with hash 2098626752, now seen corresponding path program 432 times [2021-07-09 17:50:27,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:27,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985303704] [2021-07-09 17:50:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:50:27,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:27,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985303704] [2021-07-09 17:50:27,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985303704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:27,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387829712] [2021-07-09 17:50:27,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:27,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:50:27,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:27,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:27,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:27,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:27,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:27,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:27,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:27,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:27,526 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.9 percent of original size [2021-07-09 17:50:27,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-07-09 17:50:27,527 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:37 [2021-07-09 17:50:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:27,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387829712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:27,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:27,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-09 17:50:27,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867697487] [2021-07-09 17:50:27,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:50:27,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:27,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:50:27,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:27,815 INFO L87 Difference]: Start difference. First operand 793 states and 2514 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:29,716 INFO L93 Difference]: Finished difference Result 1943 states and 5789 transitions. [2021-07-09 17:50:29,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 17:50:29,716 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:29,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:29,719 INFO L225 Difference]: With dead ends: 1943 [2021-07-09 17:50:29,719 INFO L226 Difference]: Without dead ends: 1755 [2021-07-09 17:50:29,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1538.7ms TimeCoverageRelationStatistics Valid=498, Invalid=3042, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 17:50:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2021-07-09 17:50:29,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 810. [2021-07-09 17:50:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.1520395550061804) internal successors, (2550), 809 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:29,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2550 transitions. [2021-07-09 17:50:29,732 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2550 transitions. Word has length 25 [2021-07-09 17:50:29,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:29,732 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2550 transitions. [2021-07-09 17:50:29,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:29,732 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2550 transitions. [2021-07-09 17:50:29,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:29,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:29,733 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:29,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10233,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:29,950 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:29,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:29,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1022671846, now seen corresponding path program 433 times [2021-07-09 17:50:29,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:29,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796372292] [2021-07-09 17:50:29,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:50:30,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:30,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796372292] [2021-07-09 17:50:30,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796372292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:30,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841610640] [2021-07-09 17:50:30,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:30,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:30,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:30,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:30,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:30,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:30,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:30,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:30,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:30,315 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.9 percent of original size [2021-07-09 17:50:30,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-07-09 17:50:30,316 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:37 [2021-07-09 17:50:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:30,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841610640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:30,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:30,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-07-09 17:50:30,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044299924] [2021-07-09 17:50:30,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:50:30,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:30,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:50:30,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:50:30,537 INFO L87 Difference]: Start difference. First operand 810 states and 2550 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:32,264 INFO L93 Difference]: Finished difference Result 1886 states and 5681 transitions. [2021-07-09 17:50:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 17:50:32,265 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:32,267 INFO L225 Difference]: With dead ends: 1886 [2021-07-09 17:50:32,267 INFO L226 Difference]: Without dead ends: 1748 [2021-07-09 17:50:32,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1231.1ms TimeCoverageRelationStatistics Valid=447, Invalid=2745, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:50:32,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-07-09 17:50:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 801. [2021-07-09 17:50:32,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.1525) internal successors, (2522), 800 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:32,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2522 transitions. [2021-07-09 17:50:32,280 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2522 transitions. Word has length 25 [2021-07-09 17:50:32,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:32,280 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2522 transitions. [2021-07-09 17:50:32,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:32,280 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2522 transitions. [2021-07-09 17:50:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:32,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:32,281 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:32,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10296,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:32,498 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:32,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:32,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1908470126, now seen corresponding path program 434 times [2021-07-09 17:50:32,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:32,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269477352] [2021-07-09 17:50:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:50:32,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:32,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269477352] [2021-07-09 17:50:32,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269477352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:32,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347821547] [2021-07-09 17:50:32,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:32,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:32,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:32,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:32,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:32,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:32,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:32,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:32,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:32,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:32,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:32,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:32,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-07-09 17:50:32,895 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:37 [2021-07-09 17:50:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:33,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347821547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:33,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:33,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-07-09 17:50:33,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803315244] [2021-07-09 17:50:33,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:50:33,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:33,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:50:33,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:33,094 INFO L87 Difference]: Start difference. First operand 801 states and 2522 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:35,073 INFO L93 Difference]: Finished difference Result 1753 states and 5267 transitions. [2021-07-09 17:50:35,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 17:50:35,073 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:35,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:35,076 INFO L225 Difference]: With dead ends: 1753 [2021-07-09 17:50:35,076 INFO L226 Difference]: Without dead ends: 1615 [2021-07-09 17:50:35,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1425.6ms TimeCoverageRelationStatistics Valid=489, Invalid=2817, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 17:50:35,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-07-09 17:50:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 743. [2021-07-09 17:50:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.128032345013477) internal successors, (2321), 742 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2321 transitions. [2021-07-09 17:50:35,087 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2321 transitions. Word has length 25 [2021-07-09 17:50:35,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:35,088 INFO L482 AbstractCegarLoop]: Abstraction has 743 states and 2321 transitions. [2021-07-09 17:50:35,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:35,088 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2321 transitions. [2021-07-09 17:50:35,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:35,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:35,089 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:35,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 436 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10311 [2021-07-09 17:50:35,303 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:35,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:35,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1884695932, now seen corresponding path program 435 times [2021-07-09 17:50:35,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:35,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693467393] [2021-07-09 17:50:35,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:35,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:35,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693467393] [2021-07-09 17:50:35,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693467393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:35,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525425525] [2021-07-09 17:50:35,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:35,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:50:35,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:35,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:50:35,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:50:35,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525425525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:35,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:35,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-07-09 17:50:35,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45066415] [2021-07-09 17:50:35,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:50:35,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:35,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:50:35,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:50:35,749 INFO L87 Difference]: Start difference. First operand 743 states and 2321 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:36,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:36,528 INFO L93 Difference]: Finished difference Result 1154 states and 3486 transitions. [2021-07-09 17:50:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:50:36,529 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:36,530 INFO L225 Difference]: With dead ends: 1154 [2021-07-09 17:50:36,530 INFO L226 Difference]: Without dead ends: 1077 [2021-07-09 17:50:36,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 609.6ms TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:50:36,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-07-09 17:50:36,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 768. [2021-07-09 17:50:36,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 3.1434159061277707) internal successors, (2411), 767 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2411 transitions. [2021-07-09 17:50:36,539 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2411 transitions. Word has length 25 [2021-07-09 17:50:36,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:36,540 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 2411 transitions. [2021-07-09 17:50:36,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:36,540 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2411 transitions. [2021-07-09 17:50:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:36,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:36,541 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:36,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10327,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:36,755 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:36,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:36,755 INFO L82 PathProgramCache]: Analyzing trace with hash -870181454, now seen corresponding path program 436 times [2021-07-09 17:50:36,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:36,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421854796] [2021-07-09 17:50:36,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:36,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:36,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421854796] [2021-07-09 17:50:36,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421854796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:36,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803003684] [2021-07-09 17:50:36,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:36,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:36,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:36,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:36,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:37,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803003684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:37,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:37,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-09 17:50:37,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824398955] [2021-07-09 17:50:37,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:50:37,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:37,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:50:37,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:50:37,185 INFO L87 Difference]: Start difference. First operand 768 states and 2411 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:38,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:38,326 INFO L93 Difference]: Finished difference Result 1362 states and 4048 transitions. [2021-07-09 17:50:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:50:38,326 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:38,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:38,328 INFO L225 Difference]: With dead ends: 1362 [2021-07-09 17:50:38,328 INFO L226 Difference]: Without dead ends: 1253 [2021-07-09 17:50:38,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 816.1ms TimeCoverageRelationStatistics Valid=274, Invalid=1888, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:50:38,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-07-09 17:50:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 764. [2021-07-09 17:50:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.1363040629095673) internal successors, (2393), 763 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2393 transitions. [2021-07-09 17:50:38,338 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2393 transitions. Word has length 25 [2021-07-09 17:50:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:38,338 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2393 transitions. [2021-07-09 17:50:38,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2393 transitions. [2021-07-09 17:50:38,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:38,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:38,339 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:38,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10344 [2021-07-09 17:50:38,553 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:38,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:38,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1457926776, now seen corresponding path program 437 times [2021-07-09 17:50:38,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:38,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429355237] [2021-07-09 17:50:38,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:38,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:38,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429355237] [2021-07-09 17:50:38,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429355237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:38,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178523066] [2021-07-09 17:50:38,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:38,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:50:38,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:38,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:38,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:38,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178523066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:38,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:38,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-09 17:50:38,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217362378] [2021-07-09 17:50:38,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:50:38,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:38,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:50:38,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:50:38,961 INFO L87 Difference]: Start difference. First operand 764 states and 2393 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:40,054 INFO L93 Difference]: Finished difference Result 1121 states and 3388 transitions. [2021-07-09 17:50:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:50:40,055 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:40,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:40,056 INFO L225 Difference]: With dead ends: 1121 [2021-07-09 17:50:40,056 INFO L226 Difference]: Without dead ends: 962 [2021-07-09 17:50:40,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 834.1ms TimeCoverageRelationStatistics Valid=278, Invalid=1884, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:50:40,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2021-07-09 17:50:40,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 756. [2021-07-09 17:50:40,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.1271523178807947) internal successors, (2361), 755 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:40,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2361 transitions. [2021-07-09 17:50:40,065 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2361 transitions. Word has length 25 [2021-07-09 17:50:40,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:40,065 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 2361 transitions. [2021-07-09 17:50:40,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:40,065 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2361 transitions. [2021-07-09 17:50:40,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:40,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:40,066 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:40,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10368,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:40,282 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:40,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:40,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1524473084, now seen corresponding path program 438 times [2021-07-09 17:50:40,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:40,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337011845] [2021-07-09 17:50:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:40,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:40,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337011845] [2021-07-09 17:50:40,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337011845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:40,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562402761] [2021-07-09 17:50:40,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:40,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:50:40,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:40,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:40,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:40,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:40,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:40,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:40,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:40,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:50:40,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-07-09 17:50:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:40,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562402761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:40,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:40,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-09 17:50:40,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351085856] [2021-07-09 17:50:40,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:50:40,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:40,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:50:40,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:50:40,859 INFO L87 Difference]: Start difference. First operand 756 states and 2361 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:42,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:42,224 INFO L93 Difference]: Finished difference Result 1585 states and 4739 transitions. [2021-07-09 17:50:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 17:50:42,224 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:42,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:42,226 INFO L225 Difference]: With dead ends: 1585 [2021-07-09 17:50:42,226 INFO L226 Difference]: Without dead ends: 1508 [2021-07-09 17:50:42,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 841.3ms TimeCoverageRelationStatistics Valid=364, Invalid=2086, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:50:42,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-07-09 17:50:42,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 788. [2021-07-09 17:50:42,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 3.165184243964422) internal successors, (2491), 787 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:42,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2491 transitions. [2021-07-09 17:50:42,239 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2491 transitions. Word has length 25 [2021-07-09 17:50:42,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:42,239 INFO L482 AbstractCegarLoop]: Abstraction has 788 states and 2491 transitions. [2021-07-09 17:50:42,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:42,239 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2491 transitions. [2021-07-09 17:50:42,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:42,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:42,240 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:42,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10380,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:42,441 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:42,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1755979734, now seen corresponding path program 439 times [2021-07-09 17:50:42,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:42,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267851028] [2021-07-09 17:50:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:42,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:42,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267851028] [2021-07-09 17:50:42,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267851028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:42,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026397093] [2021-07-09 17:50:42,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:42,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:42,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:42,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:42,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:42,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:42,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:42,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:50:42,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-07-09 17:50:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:43,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026397093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:43,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:43,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-09 17:50:43,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649782225] [2021-07-09 17:50:43,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:50:43,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:43,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:50:43,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:50:43,023 INFO L87 Difference]: Start difference. First operand 788 states and 2491 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:44,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:44,190 INFO L93 Difference]: Finished difference Result 1452 states and 4357 transitions. [2021-07-09 17:50:44,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:50:44,190 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:44,192 INFO L225 Difference]: With dead ends: 1452 [2021-07-09 17:50:44,192 INFO L226 Difference]: Without dead ends: 1343 [2021-07-09 17:50:44,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 830.5ms TimeCoverageRelationStatistics Valid=281, Invalid=1789, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:50:44,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2021-07-09 17:50:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 805. [2021-07-09 17:50:44,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.1430348258706466) internal successors, (2527), 804 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2527 transitions. [2021-07-09 17:50:44,203 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2527 transitions. Word has length 25 [2021-07-09 17:50:44,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:44,203 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2527 transitions. [2021-07-09 17:50:44,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:44,203 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2527 transitions. [2021-07-09 17:50:44,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:44,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:44,204 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:44,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10429 [2021-07-09 17:50:44,404 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:44,405 INFO L82 PathProgramCache]: Analyzing trace with hash -582311036, now seen corresponding path program 440 times [2021-07-09 17:50:44,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:44,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452823206] [2021-07-09 17:50:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:44,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:44,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452823206] [2021-07-09 17:50:44,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452823206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:44,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480746578] [2021-07-09 17:50:44,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:44,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:44,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:44,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:44,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:44,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:44,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:44,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:44,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:44,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:50:44,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-07-09 17:50:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:44,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480746578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:44,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:44,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-09 17:50:44,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98047125] [2021-07-09 17:50:44,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:50:44,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:44,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:50:44,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:50:44,860 INFO L87 Difference]: Start difference. First operand 805 states and 2527 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:45,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:45,857 INFO L93 Difference]: Finished difference Result 1204 states and 3648 transitions. [2021-07-09 17:50:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:50:45,858 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:45,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:45,859 INFO L225 Difference]: With dead ends: 1204 [2021-07-09 17:50:45,859 INFO L226 Difference]: Without dead ends: 1127 [2021-07-09 17:50:45,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 635.1ms TimeCoverageRelationStatistics Valid=259, Invalid=1547, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:50:45,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-07-09 17:50:45,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 747. [2021-07-09 17:50:45,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.1273458445040214) internal successors, (2333), 746 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2333 transitions. [2021-07-09 17:50:45,869 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2333 transitions. Word has length 25 [2021-07-09 17:50:45,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:45,869 INFO L482 AbstractCegarLoop]: Abstraction has 747 states and 2333 transitions. [2021-07-09 17:50:45,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2333 transitions. [2021-07-09 17:50:45,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:45,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:45,870 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:46,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10487,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:46,073 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:46,073 INFO L82 PathProgramCache]: Analyzing trace with hash -165469820, now seen corresponding path program 441 times [2021-07-09 17:50:46,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:46,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059224323] [2021-07-09 17:50:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:46,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:46,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059224323] [2021-07-09 17:50:46,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059224323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:46,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524346846] [2021-07-09 17:50:46,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:46,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:50:46,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:46,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:46,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:46,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:46,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:46,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:46,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:46,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:50:46,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-07-09 17:50:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:46,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524346846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:46,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:46,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-09 17:50:46,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610029467] [2021-07-09 17:50:46,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:50:46,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:46,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:50:46,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:50:46,653 INFO L87 Difference]: Start difference. First operand 747 states and 2333 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:47,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:47,406 INFO L93 Difference]: Finished difference Result 1438 states and 4296 transitions. [2021-07-09 17:50:47,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:50:47,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:47,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:47,408 INFO L225 Difference]: With dead ends: 1438 [2021-07-09 17:50:47,408 INFO L226 Difference]: Without dead ends: 1361 [2021-07-09 17:50:47,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 493.0ms TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:50:47,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-07-09 17:50:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 806. [2021-07-09 17:50:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1714285714285713) internal successors, (2553), 805 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2553 transitions. [2021-07-09 17:50:47,420 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2553 transitions. Word has length 25 [2021-07-09 17:50:47,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:47,420 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2553 transitions. [2021-07-09 17:50:47,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2553 transitions. [2021-07-09 17:50:47,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:47,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:47,421 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:47,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10500 [2021-07-09 17:50:47,638 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:47,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:47,638 INFO L82 PathProgramCache]: Analyzing trace with hash 849044658, now seen corresponding path program 442 times [2021-07-09 17:50:47,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:47,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283375353] [2021-07-09 17:50:47,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:47,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:47,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283375353] [2021-07-09 17:50:47,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283375353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:47,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585718029] [2021-07-09 17:50:47,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:47,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:47,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:47,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:47,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:47,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:47,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:47,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:48,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:48,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:50:48,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-07-09 17:50:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:48,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585718029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:48,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:48,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-09 17:50:48,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931864726] [2021-07-09 17:50:48,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:50:48,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:48,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:50:48,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:50:48,179 INFO L87 Difference]: Start difference. First operand 806 states and 2553 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:48,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:48,953 INFO L93 Difference]: Finished difference Result 1346 states and 4041 transitions. [2021-07-09 17:50:48,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:50:48,953 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:48,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:48,955 INFO L225 Difference]: With dead ends: 1346 [2021-07-09 17:50:48,955 INFO L226 Difference]: Without dead ends: 1237 [2021-07-09 17:50:48,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 509.5ms TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:50:48,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-07-09 17:50:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 823. [2021-07-09 17:50:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.1496350364963503) internal successors, (2589), 822 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2589 transitions. [2021-07-09 17:50:48,965 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2589 transitions. Word has length 25 [2021-07-09 17:50:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:48,965 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2589 transitions. [2021-07-09 17:50:48,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2589 transitions. [2021-07-09 17:50:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:48,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:48,967 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:49,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10553 [2021-07-09 17:50:49,167 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:49,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:49,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2022713356, now seen corresponding path program 443 times [2021-07-09 17:50:49,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:49,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229805545] [2021-07-09 17:50:49,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:49,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:49,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229805545] [2021-07-09 17:50:49,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229805545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:49,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584534056] [2021-07-09 17:50:49,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:49,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:50:49,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:49,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:49,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:49,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:49,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:49,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:49,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:49,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:50:49,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-07-09 17:50:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:49,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584534056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:49,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:49,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-09 17:50:49,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767942980] [2021-07-09 17:50:49,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:50:49,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:49,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:50:49,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:50:49,623 INFO L87 Difference]: Start difference. First operand 823 states and 2589 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:50,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:50,434 INFO L93 Difference]: Finished difference Result 1234 states and 3749 transitions. [2021-07-09 17:50:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:50:50,434 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:50,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:50,436 INFO L225 Difference]: With dead ends: 1234 [2021-07-09 17:50:50,436 INFO L226 Difference]: Without dead ends: 1157 [2021-07-09 17:50:50,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 477.9ms TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:50:50,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-07-09 17:50:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 814. [2021-07-09 17:50:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.1500615006150063) internal successors, (2561), 813 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2561 transitions. [2021-07-09 17:50:50,447 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2561 transitions. Word has length 25 [2021-07-09 17:50:50,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:50,447 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2561 transitions. [2021-07-09 17:50:50,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:50,447 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2561 transitions. [2021-07-09 17:50:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:50,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:50,448 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:50,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10595 [2021-07-09 17:50:50,661 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:50,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:50,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1136915076, now seen corresponding path program 444 times [2021-07-09 17:50:50,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:50,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012895772] [2021-07-09 17:50:50,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:50,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:50,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012895772] [2021-07-09 17:50:50,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012895772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:50,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823374247] [2021-07-09 17:50:50,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:50,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:50:50,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:50,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:50,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:50,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:50,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:50,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:51,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:51,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:50:51,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:28 [2021-07-09 17:50:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:51,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823374247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:51,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:51,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-09 17:50:51,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66140153] [2021-07-09 17:50:51,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:50:51,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:51,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:50:51,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:50:51,114 INFO L87 Difference]: Start difference. First operand 814 states and 2561 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:51,855 INFO L93 Difference]: Finished difference Result 1183 states and 3591 transitions. [2021-07-09 17:50:51,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:50:51,856 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:51,857 INFO L225 Difference]: With dead ends: 1183 [2021-07-09 17:50:51,857 INFO L226 Difference]: Without dead ends: 1106 [2021-07-09 17:50:51,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 486.0ms TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:50:51,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-07-09 17:50:51,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 747. [2021-07-09 17:50:51,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.1273458445040214) internal successors, (2333), 746 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:51,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2333 transitions. [2021-07-09 17:50:51,866 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2333 transitions. Word has length 25 [2021-07-09 17:50:51,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:51,867 INFO L482 AbstractCegarLoop]: Abstraction has 747 states and 2333 transitions. [2021-07-09 17:50:51,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2333 transitions. [2021-07-09 17:50:51,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:51,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:51,867 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:52,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10606,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:52,081 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:52,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:52,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1586044672, now seen corresponding path program 445 times [2021-07-09 17:50:52,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:52,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351867104] [2021-07-09 17:50:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:52,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:52,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351867104] [2021-07-09 17:50:52,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351867104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:52,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487373802] [2021-07-09 17:50:52,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:52,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:52,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:52,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:52,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:52,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:52,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:52,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:52,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:52,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:52,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:52,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:50:52,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:52,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:52,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:50:52,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:52,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:52,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:50:52,579 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:146, output treesize:59 [2021-07-09 17:50:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:52,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487373802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:52,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:52,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-09 17:50:52,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373848393] [2021-07-09 17:50:52,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:50:52,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:52,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:50:52,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:52,763 INFO L87 Difference]: Start difference. First operand 747 states and 2333 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:54,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:54,106 INFO L93 Difference]: Finished difference Result 1493 states and 4406 transitions. [2021-07-09 17:50:54,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:50:54,106 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:54,109 INFO L225 Difference]: With dead ends: 1493 [2021-07-09 17:50:54,109 INFO L226 Difference]: Without dead ends: 1384 [2021-07-09 17:50:54,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 993.6ms TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:50:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-07-09 17:50:54,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 777. [2021-07-09 17:50:54,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.1237113402061856) internal successors, (2424), 776 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2424 transitions. [2021-07-09 17:50:54,121 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2424 transitions. Word has length 25 [2021-07-09 17:50:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:54,121 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2424 transitions. [2021-07-09 17:50:54,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:54,121 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2424 transitions. [2021-07-09 17:50:54,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:54,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:54,122 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:54,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10619 [2021-07-09 17:50:54,338 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:54,339 INFO L82 PathProgramCache]: Analyzing trace with hash 998299350, now seen corresponding path program 446 times [2021-07-09 17:50:54,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:54,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997161379] [2021-07-09 17:50:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:54,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:54,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997161379] [2021-07-09 17:50:54,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997161379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:54,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3393884] [2021-07-09 17:50:54,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:54,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:54,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:54,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:54,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:54,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:50:54,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:54,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:54,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:54,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:50:54,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:54,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:54,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:54,776 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:54,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:54,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:50:54,803 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:103, output treesize:59 [2021-07-09 17:50:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:54,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3393884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:54,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:54,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-09 17:50:54,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983296003] [2021-07-09 17:50:54,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:50:54,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:54,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:50:54,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:54,956 INFO L87 Difference]: Start difference. First operand 777 states and 2424 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:56,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:56,092 INFO L93 Difference]: Finished difference Result 1201 states and 3603 transitions. [2021-07-09 17:50:56,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:50:56,092 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:56,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:56,094 INFO L225 Difference]: With dead ends: 1201 [2021-07-09 17:50:56,094 INFO L226 Difference]: Without dead ends: 1060 [2021-07-09 17:50:56,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 819.5ms TimeCoverageRelationStatistics Valid=212, Invalid=1348, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:50:56,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-07-09 17:50:56,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 775. [2021-07-09 17:50:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.1136950904392764) internal successors, (2410), 774 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:56,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2410 transitions. [2021-07-09 17:50:56,103 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2410 transitions. Word has length 25 [2021-07-09 17:50:56,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:56,103 INFO L482 AbstractCegarLoop]: Abstraction has 775 states and 2410 transitions. [2021-07-09 17:50:56,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2410 transitions. [2021-07-09 17:50:56,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:56,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:56,104 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:56,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10657 [2021-07-09 17:50:56,320 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:56,321 INFO L82 PathProgramCache]: Analyzing trace with hash -41936448, now seen corresponding path program 447 times [2021-07-09 17:50:56,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:56,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932281849] [2021-07-09 17:50:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:56,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:56,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932281849] [2021-07-09 17:50:56,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932281849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:56,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470463322] [2021-07-09 17:50:56,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:56,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:50:56,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:56,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:50:56,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:56,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:56,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:56,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:56,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:56,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:50:56,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:56,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:56,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:56,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:50:56,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:56,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:56,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:56,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:50:56,782 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:56,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:56,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:56,785 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:56,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:56,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:50:56,813 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:198, output treesize:62 [2021-07-09 17:50:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:56,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470463322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:56,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:56,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-09 17:50:56,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594132431] [2021-07-09 17:50:56,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:50:56,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:56,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:50:56,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:56,960 INFO L87 Difference]: Start difference. First operand 775 states and 2410 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:58,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:58,136 INFO L93 Difference]: Finished difference Result 1130 states and 3389 transitions. [2021-07-09 17:50:58,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:50:58,137 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:58,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:58,138 INFO L225 Difference]: With dead ends: 1130 [2021-07-09 17:50:58,138 INFO L226 Difference]: Without dead ends: 939 [2021-07-09 17:50:58,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 801.8ms TimeCoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:50:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-07-09 17:50:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 773. [2021-07-09 17:50:58,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.1036269430051813) internal successors, (2396), 772 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2396 transitions. [2021-07-09 17:50:58,147 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2396 transitions. Word has length 25 [2021-07-09 17:50:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:58,147 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2396 transitions. [2021-07-09 17:50:58,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:58,147 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2396 transitions. [2021-07-09 17:50:58,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:58,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:58,148 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:58,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10681,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:58,365 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:58,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:58,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1118412710, now seen corresponding path program 448 times [2021-07-09 17:50:58,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:58,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326270717] [2021-07-09 17:50:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:50:58,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:58,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326270717] [2021-07-09 17:50:58,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326270717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:58,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609411810] [2021-07-09 17:50:58,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:58,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:58,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:58,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:50:58,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:58,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:58,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:58,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:58,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:58,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:58,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:58,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:50:58,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:58,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:50:58,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:50:58,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:50:58,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:50:58,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:50:58,811 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:95, output treesize:51 [2021-07-09 17:50:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:58,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609411810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:58,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:58,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-09 17:50:58,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598174547] [2021-07-09 17:50:58,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:50:58,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:58,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:50:58,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:50:58,932 INFO L87 Difference]: Start difference. First operand 773 states and 2396 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:59,807 INFO L93 Difference]: Finished difference Result 1278 states and 3822 transitions. [2021-07-09 17:50:59,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:50:59,807 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:50:59,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:59,809 INFO L225 Difference]: With dead ends: 1278 [2021-07-09 17:50:59,809 INFO L226 Difference]: Without dead ends: 1201 [2021-07-09 17:50:59,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 608.8ms TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:50:59,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-07-09 17:50:59,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 789. [2021-07-09 17:50:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 3.116751269035533) internal successors, (2456), 788 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2456 transitions. [2021-07-09 17:50:59,819 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2456 transitions. Word has length 25 [2021-07-09 17:50:59,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:59,819 INFO L482 AbstractCegarLoop]: Abstraction has 789 states and 2456 transitions. [2021-07-09 17:50:59,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:59,819 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2456 transitions. [2021-07-09 17:50:59,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:50:59,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:59,820 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:00,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10711,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:00,035 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:00,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:00,035 INFO L82 PathProgramCache]: Analyzing trace with hash -103898232, now seen corresponding path program 449 times [2021-07-09 17:51:00,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:00,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811361920] [2021-07-09 17:51:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:00,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:00,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811361920] [2021-07-09 17:51:00,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811361920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:00,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852767903] [2021-07-09 17:51:00,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:00,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:51:00,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:00,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:51:00,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:00,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:00,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:00,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:00,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:00,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:00,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:00,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:00,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:00,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:00,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:00,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:00,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:00,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:00,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:00,510 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:00,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:00,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:51:00,541 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:130, output treesize:51 [2021-07-09 17:51:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:00,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852767903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:00,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:00,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-09 17:51:00,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968481040] [2021-07-09 17:51:00,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:51:00,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:00,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:51:00,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:00,668 INFO L87 Difference]: Start difference. First operand 789 states and 2456 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:01,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:01,667 INFO L93 Difference]: Finished difference Result 1335 states and 3949 transitions. [2021-07-09 17:51:01,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:51:01,667 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:51:01,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:01,669 INFO L225 Difference]: With dead ends: 1335 [2021-07-09 17:51:01,669 INFO L226 Difference]: Without dead ends: 1226 [2021-07-09 17:51:01,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 736.1ms TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:51:01,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-07-09 17:51:01,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 781. [2021-07-09 17:51:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.1076923076923078) internal successors, (2424), 780 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:01,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2424 transitions. [2021-07-09 17:51:01,680 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2424 transitions. Word has length 25 [2021-07-09 17:51:01,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:01,680 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2424 transitions. [2021-07-09 17:51:01,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:01,680 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2424 transitions. [2021-07-09 17:51:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:51:01,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:01,681 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:01,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10729,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:01,897 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:01,897 INFO L82 PathProgramCache]: Analyzing trace with hash -691643554, now seen corresponding path program 450 times [2021-07-09 17:51:01,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:01,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562517967] [2021-07-09 17:51:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:01,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:01,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562517967] [2021-07-09 17:51:01,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562517967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:01,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242604763] [2021-07-09 17:51:01,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:02,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:51:02,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:02,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:51:02,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:02,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:02,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:02,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:02,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:02,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:02,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:02,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:02,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:02,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:02,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:02,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:02,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:02,333 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:02,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:02,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:51:02,359 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:130, output treesize:51 [2021-07-09 17:51:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:02,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242604763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:02,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:02,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-09 17:51:02,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585987582] [2021-07-09 17:51:02,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:51:02,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:02,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:51:02,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:02,467 INFO L87 Difference]: Start difference. First operand 781 states and 2424 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:03,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:03,264 INFO L93 Difference]: Finished difference Result 1087 states and 3268 transitions. [2021-07-09 17:51:03,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:51:03,264 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:51:03,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:03,266 INFO L225 Difference]: With dead ends: 1087 [2021-07-09 17:51:03,266 INFO L226 Difference]: Without dead ends: 946 [2021-07-09 17:51:03,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 567.8ms TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:51:03,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-07-09 17:51:03,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 773. [2021-07-09 17:51:03,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.098445595854922) internal successors, (2392), 772 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2392 transitions. [2021-07-09 17:51:03,275 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2392 transitions. Word has length 25 [2021-07-09 17:51:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:03,275 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2392 transitions. [2021-07-09 17:51:03,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2392 transitions. [2021-07-09 17:51:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:51:03,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:03,276 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:03,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10763 [2021-07-09 17:51:03,492 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:03,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:03,492 INFO L82 PathProgramCache]: Analyzing trace with hash -2004210990, now seen corresponding path program 451 times [2021-07-09 17:51:03,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:03,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755669796] [2021-07-09 17:51:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:03,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:03,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755669796] [2021-07-09 17:51:03,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755669796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:03,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872165279] [2021-07-09 17:51:03,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:03,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:51:03,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:03,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:03,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:03,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:03,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:03,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:03,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:03,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2021-07-09 17:51:03,934 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:40 [2021-07-09 17:51:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:04,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872165279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:04,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:04,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-09 17:51:04,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421843698] [2021-07-09 17:51:04,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:51:04,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:04,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:51:04,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:04,186 INFO L87 Difference]: Start difference. First operand 773 states and 2392 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:04,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:04,914 INFO L93 Difference]: Finished difference Result 1492 states and 4440 transitions. [2021-07-09 17:51:04,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:51:04,915 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:51:04,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:04,917 INFO L225 Difference]: With dead ends: 1492 [2021-07-09 17:51:04,917 INFO L226 Difference]: Without dead ends: 1415 [2021-07-09 17:51:04,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 475.8ms TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:51:04,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-07-09 17:51:04,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 807. [2021-07-09 17:51:04,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.1377171215880892) internal successors, (2529), 806 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:04,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2529 transitions. [2021-07-09 17:51:04,928 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2529 transitions. Word has length 25 [2021-07-09 17:51:04,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:04,929 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2529 transitions. [2021-07-09 17:51:04,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:04,929 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2529 transitions. [2021-07-09 17:51:04,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:51:04,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:04,930 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:05,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10788 [2021-07-09 17:51:05,145 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:05,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:05,145 INFO L82 PathProgramCache]: Analyzing trace with hash -989696512, now seen corresponding path program 452 times [2021-07-09 17:51:05,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:05,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236672732] [2021-07-09 17:51:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:05,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:05,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236672732] [2021-07-09 17:51:05,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236672732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:05,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601687882] [2021-07-09 17:51:05,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:05,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:05,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:05,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:51:05,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:05,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:05,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:05,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:05,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:05,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:05,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:05,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:05,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2021-07-09 17:51:05,564 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:40 [2021-07-09 17:51:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:05,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601687882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:05,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:05,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-09 17:51:05,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416587750] [2021-07-09 17:51:05,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:51:05,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:05,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:51:05,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:05,820 INFO L87 Difference]: Start difference. First operand 807 states and 2529 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:06,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:06,631 INFO L93 Difference]: Finished difference Result 1366 states and 4080 transitions. [2021-07-09 17:51:06,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:51:06,631 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:51:06,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:06,633 INFO L225 Difference]: With dead ends: 1366 [2021-07-09 17:51:06,633 INFO L226 Difference]: Without dead ends: 1257 [2021-07-09 17:51:06,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 485.9ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:51:06,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-07-09 17:51:06,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 799. [2021-07-09 17:51:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.1290726817042605) internal successors, (2497), 798 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2497 transitions. [2021-07-09 17:51:06,644 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2497 transitions. Word has length 25 [2021-07-09 17:51:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:06,644 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2497 transitions. [2021-07-09 17:51:06,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2497 transitions. [2021-07-09 17:51:06,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:51:06,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:06,645 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:06,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10852 [2021-07-09 17:51:06,845 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:06,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:06,846 INFO L82 PathProgramCache]: Analyzing trace with hash 183972186, now seen corresponding path program 453 times [2021-07-09 17:51:06,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:06,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530862524] [2021-07-09 17:51:06,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:06,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:06,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530862524] [2021-07-09 17:51:06,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530862524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:06,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997346071] [2021-07-09 17:51:06,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:07,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:51:07,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:07,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:51:07,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:07,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:07,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:07,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:07,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:07,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:07,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:07,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:07,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2021-07-09 17:51:07,296 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:40 [2021-07-09 17:51:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:07,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997346071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:07,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:07,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-09 17:51:07,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057679288] [2021-07-09 17:51:07,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:51:07,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:07,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:51:07,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:07,419 INFO L87 Difference]: Start difference. First operand 799 states and 2497 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:08,353 INFO L93 Difference]: Finished difference Result 1137 states and 3423 transitions. [2021-07-09 17:51:08,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:51:08,353 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:51:08,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:08,355 INFO L225 Difference]: With dead ends: 1137 [2021-07-09 17:51:08,355 INFO L226 Difference]: Without dead ends: 1060 [2021-07-09 17:51:08,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 529.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:51:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-07-09 17:51:08,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 762. [2021-07-09 17:51:08,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.099868593955322) internal successors, (2359), 761 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:08,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2359 transitions. [2021-07-09 17:51:08,364 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2359 transitions. Word has length 25 [2021-07-09 17:51:08,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:08,364 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2359 transitions. [2021-07-09 17:51:08,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:08,364 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2359 transitions. [2021-07-09 17:51:08,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:51:08,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:08,365 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:08,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10899 [2021-07-09 17:51:08,581 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:08,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:08,581 INFO L82 PathProgramCache]: Analyzing trace with hash -247809070, now seen corresponding path program 454 times [2021-07-09 17:51:08,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:08,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039625048] [2021-07-09 17:51:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:08,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:08,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039625048] [2021-07-09 17:51:08,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039625048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:08,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268169781] [2021-07-09 17:51:08,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:08,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:08,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:08,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:51:08,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:08,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:08,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:08,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:08,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:08,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:08,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:08,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2021-07-09 17:51:08,999 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:40 [2021-07-09 17:51:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:09,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268169781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:09,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:09,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-09 17:51:09,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759841727] [2021-07-09 17:51:09,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:51:09,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:09,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:51:09,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:09,310 INFO L87 Difference]: Start difference. First operand 762 states and 2359 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:10,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:10,324 INFO L93 Difference]: Finished difference Result 1456 states and 4315 transitions. [2021-07-09 17:51:10,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:51:10,324 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:51:10,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:10,326 INFO L225 Difference]: With dead ends: 1456 [2021-07-09 17:51:10,326 INFO L226 Difference]: Without dead ends: 1379 [2021-07-09 17:51:10,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 674.5ms TimeCoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:51:10,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-07-09 17:51:10,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 786. [2021-07-09 17:51:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.122292993630573) internal successors, (2451), 785 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:10,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2451 transitions. [2021-07-09 17:51:10,337 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2451 transitions. Word has length 25 [2021-07-09 17:51:10,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:10,337 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 2451 transitions. [2021-07-09 17:51:10,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:10,337 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2451 transitions. [2021-07-09 17:51:10,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:51:10,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:10,338 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:10,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10927,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:10,553 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:10,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:10,553 INFO L82 PathProgramCache]: Analyzing trace with hash 766705408, now seen corresponding path program 455 times [2021-07-09 17:51:10,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:10,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060722986] [2021-07-09 17:51:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:10,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:10,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060722986] [2021-07-09 17:51:10,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060722986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:10,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184000058] [2021-07-09 17:51:10,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:10,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:51:10,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:10,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:51:10,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:10,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:10,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:10,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:10,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:10,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:10,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:10,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2021-07-09 17:51:10,989 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:40 [2021-07-09 17:51:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:11,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184000058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:11,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:11,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-09 17:51:11,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016912505] [2021-07-09 17:51:11,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:51:11,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:11,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:51:11,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:11,408 INFO L87 Difference]: Start difference. First operand 786 states and 2451 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:12,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:12,226 INFO L93 Difference]: Finished difference Result 1331 states and 3963 transitions. [2021-07-09 17:51:12,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:51:12,227 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:51:12,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:12,229 INFO L225 Difference]: With dead ends: 1331 [2021-07-09 17:51:12,229 INFO L226 Difference]: Without dead ends: 1222 [2021-07-09 17:51:12,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 628.3ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:51:12,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-07-09 17:51:12,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 778. [2021-07-09 17:51:12,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 3.113256113256113) internal successors, (2419), 777 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 2419 transitions. [2021-07-09 17:51:12,239 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 2419 transitions. Word has length 25 [2021-07-09 17:51:12,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:12,239 INFO L482 AbstractCegarLoop]: Abstraction has 778 states and 2419 transitions. [2021-07-09 17:51:12,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:12,239 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 2419 transitions. [2021-07-09 17:51:12,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:51:12,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:12,240 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:12,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10980 [2021-07-09 17:51:12,456 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:12,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:12,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1940374106, now seen corresponding path program 456 times [2021-07-09 17:51:12,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:12,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105617840] [2021-07-09 17:51:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:12,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:12,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105617840] [2021-07-09 17:51:12,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105617840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:12,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174361615] [2021-07-09 17:51:12,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:12,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:51:12,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:12,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:51:12,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:12,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:12,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:12,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:12,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:12,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:12,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:12,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2021-07-09 17:51:12,887 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:40 [2021-07-09 17:51:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:13,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174361615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:13,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:13,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-09 17:51:13,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814897760] [2021-07-09 17:51:13,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:51:13,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:13,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:51:13,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:13,049 INFO L87 Difference]: Start difference. First operand 778 states and 2419 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:14,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:14,017 INFO L93 Difference]: Finished difference Result 1136 states and 3430 transitions. [2021-07-09 17:51:14,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:51:14,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:51:14,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:14,018 INFO L225 Difference]: With dead ends: 1136 [2021-07-09 17:51:14,018 INFO L226 Difference]: Without dead ends: 1059 [2021-07-09 17:51:14,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 621.7ms TimeCoverageRelationStatistics Valid=212, Invalid=1348, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:51:14,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-07-09 17:51:14,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 769. [2021-07-09 17:51:14,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.11328125) internal successors, (2391), 768 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2391 transitions. [2021-07-09 17:51:14,027 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2391 transitions. Word has length 25 [2021-07-09 17:51:14,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:14,028 INFO L482 AbstractCegarLoop]: Abstraction has 769 states and 2391 transitions. [2021-07-09 17:51:14,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2391 transitions. [2021-07-09 17:51:14,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:51:14,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:14,029 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:14,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11109,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:14,245 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:14,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:14,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1054575826, now seen corresponding path program 457 times [2021-07-09 17:51:14,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:14,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952970317] [2021-07-09 17:51:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:14,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:14,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952970317] [2021-07-09 17:51:14,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952970317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:14,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632211118] [2021-07-09 17:51:14,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:14,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:51:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:14,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:14,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:14,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:14,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:14,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:14,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:14,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:14,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2021-07-09 17:51:14,674 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:40 [2021-07-09 17:51:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:14,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632211118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:14,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:14,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-09 17:51:14,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558548454] [2021-07-09 17:51:14,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:51:14,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:14,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:51:14,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:14,848 INFO L87 Difference]: Start difference. First operand 769 states and 2391 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:15,746 INFO L93 Difference]: Finished difference Result 1108 states and 3333 transitions. [2021-07-09 17:51:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:51:15,746 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:51:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:15,748 INFO L225 Difference]: With dead ends: 1108 [2021-07-09 17:51:15,748 INFO L226 Difference]: Without dead ends: 1031 [2021-07-09 17:51:15,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 524.1ms TimeCoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:51:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-07-09 17:51:15,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 707. [2021-07-09 17:51:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.086402266288952) internal successors, (2179), 706 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:15,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2179 transitions. [2021-07-09 17:51:15,757 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2179 transitions. Word has length 25 [2021-07-09 17:51:15,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:15,757 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2179 transitions. [2021-07-09 17:51:15,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:15,757 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2179 transitions. [2021-07-09 17:51:15,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:51:15,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:15,758 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:15,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11145,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:15,958 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:15,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:15,958 INFO L82 PathProgramCache]: Analyzing trace with hash 647024432, now seen corresponding path program 458 times [2021-07-09 17:51:15,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:15,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664407596] [2021-07-09 17:51:15,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:16,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:16,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664407596] [2021-07-09 17:51:16,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664407596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:16,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433868161] [2021-07-09 17:51:16,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:16,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:16,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:16,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:51:16,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:16,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:16,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:16,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:16,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:16,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:16,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:16,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:16,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:16,402 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:16,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:16,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 17:51:16,428 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:103, output treesize:59 [2021-07-09 17:51:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:16,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433868161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:16,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:16,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-07-09 17:51:16,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402476852] [2021-07-09 17:51:16,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:51:16,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:16,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:51:16,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:51:16,598 INFO L87 Difference]: Start difference. First operand 707 states and 2179 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:17,499 INFO L93 Difference]: Finished difference Result 1013 states and 3027 transitions. [2021-07-09 17:51:17,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:51:17,499 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 17:51:17,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:17,501 INFO L225 Difference]: With dead ends: 1013 [2021-07-09 17:51:17,501 INFO L226 Difference]: Without dead ends: 936 [2021-07-09 17:51:17,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 754.2ms TimeCoverageRelationStatistics Valid=300, Invalid=1506, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:51:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-07-09 17:51:17,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 598. [2021-07-09 17:51:17,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 2.996649916247906) internal successors, (1789), 597 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1789 transitions. [2021-07-09 17:51:17,508 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1789 transitions. Word has length 25 [2021-07-09 17:51:17,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:17,508 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 1789 transitions. [2021-07-09 17:51:17,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:17,508 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1789 transitions. [2021-07-09 17:51:17,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:17,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:17,509 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:17,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11182,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:17,724 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:17,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:17,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1687053398, now seen corresponding path program 459 times [2021-07-09 17:51:17,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:17,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453349119] [2021-07-09 17:51:17,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:51:17,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:17,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453349119] [2021-07-09 17:51:17,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453349119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:17,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558163592] [2021-07-09 17:51:17,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:17,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:51:17,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:17,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:51:17,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:18,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:18,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:18,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:18,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:18,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:18,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:18,176 INFO L628 ElimStorePlain]: treesize reduction 33, result has 73.8 percent of original size [2021-07-09 17:51:18,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:18,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:18,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:18,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:18,216 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:18,265 INFO L628 ElimStorePlain]: treesize reduction 21, result has 75.6 percent of original size [2021-07-09 17:51:18,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:51:18,267 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:137, output treesize:57 [2021-07-09 17:51:18,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:18,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:18,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:18,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:18,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:18,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:18,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:18,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:18,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:18,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:18,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:18,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:18,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:18,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:18,488 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:18,626 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-07-09 17:51:18,626 INFO L628 ElimStorePlain]: treesize reduction 96, result has 56.0 percent of original size [2021-07-09 17:51:18,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:18,631 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:18,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:18,634 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:18,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:18,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:51:18,698 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:298, output treesize:78 [2021-07-09 17:51:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:51:18,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558163592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:18,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:18,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-07-09 17:51:18,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050228693] [2021-07-09 17:51:18,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:51:18,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:18,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:51:18,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:51:18,862 INFO L87 Difference]: Start difference. First operand 598 states and 1789 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:20,891 INFO L93 Difference]: Finished difference Result 1230 states and 3572 transitions. [2021-07-09 17:51:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:51:20,892 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:20,893 INFO L225 Difference]: With dead ends: 1230 [2021-07-09 17:51:20,893 INFO L226 Difference]: Without dead ends: 1023 [2021-07-09 17:51:20,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1362.3ms TimeCoverageRelationStatistics Valid=254, Invalid=2826, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:51:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-07-09 17:51:20,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 708. [2021-07-09 17:51:20,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 3.0028288543140027) internal successors, (2123), 707 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:20,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2123 transitions. [2021-07-09 17:51:20,903 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2123 transitions. Word has length 26 [2021-07-09 17:51:20,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:20,903 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 2123 transitions. [2021-07-09 17:51:20,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:20,903 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2123 transitions. [2021-07-09 17:51:20,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:20,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:20,904 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:21,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11205 [2021-07-09 17:51:21,109 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:21,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:21,109 INFO L82 PathProgramCache]: Analyzing trace with hash 887746618, now seen corresponding path program 460 times [2021-07-09 17:51:21,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:21,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920216658] [2021-07-09 17:51:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:21,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:21,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920216658] [2021-07-09 17:51:21,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920216658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:21,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011498617] [2021-07-09 17:51:21,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:21,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:21,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:21,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:51:21,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:21,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:21,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:21,553 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-07-09 17:51:21,553 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-07-09 17:51:21,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:21,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:21,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:21,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:21,630 INFO L628 ElimStorePlain]: treesize reduction 22, result has 79.2 percent of original size [2021-07-09 17:51:21,630 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-07-09 17:51:21,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:21,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:21,683 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-07-09 17:51:21,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:51:21,684 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:117, output treesize:61 [2021-07-09 17:51:21,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:21,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:21,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:21,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:21,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:21,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:21,957 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-07-09 17:51:21,957 INFO L628 ElimStorePlain]: treesize reduction 69, result has 68.9 percent of original size [2021-07-09 17:51:21,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:21,961 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:21,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:21,965 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:21,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:21,969 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:21,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:21,973 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:21,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:21,976 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:22,097 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-07-09 17:51:22,097 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.3 percent of original size [2021-07-09 17:51:22,097 INFO L518 ElimStorePlain]: Eliminatee v_prenex_552 vanished before elimination [2021-07-09 17:51:22,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:22,101 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:22,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:22,105 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:22,189 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-07-09 17:51:22,189 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-07-09 17:51:22,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:51:22,191 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 6 variables, input treesize:231, output treesize:98 [2021-07-09 17:51:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:51:22,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011498617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:22,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:22,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 19 [2021-07-09 17:51:22,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45696477] [2021-07-09 17:51:22,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:51:22,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:22,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:51:22,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:51:22,336 INFO L87 Difference]: Start difference. First operand 708 states and 2123 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:23,492 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-07-09 17:51:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:24,054 INFO L93 Difference]: Finished difference Result 1160 states and 3359 transitions. [2021-07-09 17:51:24,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:51:24,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:24,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:24,056 INFO L225 Difference]: With dead ends: 1160 [2021-07-09 17:51:24,056 INFO L226 Difference]: Without dead ends: 1070 [2021-07-09 17:51:24,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1398.2ms TimeCoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:51:24,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2021-07-09 17:51:24,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 719. [2021-07-09 17:51:24,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.01949860724234) internal successors, (2168), 718 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2168 transitions. [2021-07-09 17:51:24,065 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2168 transitions. Word has length 26 [2021-07-09 17:51:24,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:24,065 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 2168 transitions. [2021-07-09 17:51:24,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2168 transitions. [2021-07-09 17:51:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:24,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:24,066 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:24,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11277 [2021-07-09 17:51:24,266 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:24,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:24,266 INFO L82 PathProgramCache]: Analyzing trace with hash -2116679156, now seen corresponding path program 461 times [2021-07-09 17:51:24,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:24,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123125187] [2021-07-09 17:51:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:51:24,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:24,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123125187] [2021-07-09 17:51:24,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123125187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:24,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444863319] [2021-07-09 17:51:24,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:24,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:51:24,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:24,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:51:24,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:24,892 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_2, v_prenex_555, v_prenex_556], 1=[ends_with_6]} [2021-07-09 17:51:24,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:24,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:24,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:24,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:24,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:24,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:24,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:24,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:25,023 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-07-09 17:51:25,024 INFO L628 ElimStorePlain]: treesize reduction 220, result has 32.7 percent of original size [2021-07-09 17:51:25,024 INFO L518 ElimStorePlain]: Eliminatee v_prenex_555 vanished before elimination [2021-07-09 17:51:25,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:25,027 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:25,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:25,030 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:25,085 INFO L628 ElimStorePlain]: treesize reduction 26, result has 73.7 percent of original size [2021-07-09 17:51:25,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:25,088 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:25,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:25,091 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:25,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:25,093 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:25,136 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.4 percent of original size [2021-07-09 17:51:25,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:51:25,137 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:365, output treesize:35 [2021-07-09 17:51:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:51:25,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444863319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:25,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:25,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-07-09 17:51:25,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643840960] [2021-07-09 17:51:25,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:51:25,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:25,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:51:25,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:51:25,217 INFO L87 Difference]: Start difference. First operand 719 states and 2168 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:25,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:25,904 INFO L93 Difference]: Finished difference Result 1173 states and 3475 transitions. [2021-07-09 17:51:25,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:51:25,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:25,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:25,906 INFO L225 Difference]: With dead ends: 1173 [2021-07-09 17:51:25,906 INFO L226 Difference]: Without dead ends: 1112 [2021-07-09 17:51:25,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 751.0ms TimeCoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:51:25,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-07-09 17:51:25,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 729. [2021-07-09 17:51:25,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.048076923076923) internal successors, (2219), 728 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2219 transitions. [2021-07-09 17:51:25,915 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2219 transitions. Word has length 26 [2021-07-09 17:51:25,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:25,915 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2219 transitions. [2021-07-09 17:51:25,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:25,915 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2219 transitions. [2021-07-09 17:51:25,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:25,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:25,916 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:26,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11302,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:26,133 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:26,133 INFO L82 PathProgramCache]: Analyzing trace with hash 945435096, now seen corresponding path program 462 times [2021-07-09 17:51:26,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:26,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905984255] [2021-07-09 17:51:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:26,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:26,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905984255] [2021-07-09 17:51:26,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905984255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:26,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870515924] [2021-07-09 17:51:26,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:26,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:51:26,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:26,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:51:26,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:27,079 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_557, ends_with_6], 1=[ends_with_2]} [2021-07-09 17:51:27,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:27,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:27,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:27,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:27,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:27,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:27,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:27,093 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:27,096 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:27,096 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:27,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:27,100 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:27,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:27,103 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:27,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:27,106 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:27,198 INFO L628 ElimStorePlain]: treesize reduction 82, result has 54.7 percent of original size [2021-07-09 17:51:27,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:27,202 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:27,268 INFO L628 ElimStorePlain]: treesize reduction 26, result has 72.9 percent of original size [2021-07-09 17:51:27,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:27,272 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:27,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:27,275 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:27,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:27,278 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:27,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:27,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:51:27,306 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:298, output treesize:33 [2021-07-09 17:51:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:51:27,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870515924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:27,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:27,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 24 [2021-07-09 17:51:27,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409835323] [2021-07-09 17:51:27,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:51:27,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:27,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:51:27,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:51:27,379 INFO L87 Difference]: Start difference. First operand 729 states and 2219 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:29,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:29,522 INFO L93 Difference]: Finished difference Result 1182 states and 3422 transitions. [2021-07-09 17:51:29,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 17:51:29,522 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:29,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:29,524 INFO L225 Difference]: With dead ends: 1182 [2021-07-09 17:51:29,524 INFO L226 Difference]: Without dead ends: 1074 [2021-07-09 17:51:29,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1605.0ms TimeCoverageRelationStatistics Valid=258, Invalid=2604, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:51:29,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-07-09 17:51:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 787. [2021-07-09 17:51:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.035623409669211) internal successors, (2386), 786 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:29,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2386 transitions. [2021-07-09 17:51:29,534 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2386 transitions. Word has length 26 [2021-07-09 17:51:29,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:29,534 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2386 transitions. [2021-07-09 17:51:29,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:29,534 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2386 transitions. [2021-07-09 17:51:29,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:29,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:29,535 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:29,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11376 [2021-07-09 17:51:29,753 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:29,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:29,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1438465558, now seen corresponding path program 463 times [2021-07-09 17:51:29,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:29,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237068686] [2021-07-09 17:51:29,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:29,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:29,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237068686] [2021-07-09 17:51:29,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237068686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:29,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158663293] [2021-07-09 17:51:29,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:30,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:51:30,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:30,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:30,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:30,114 INFO L628 ElimStorePlain]: treesize reduction 48, result has 54.3 percent of original size [2021-07-09 17:51:30,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:30,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:30,134 INFO L628 ElimStorePlain]: treesize reduction 21, result has 60.4 percent of original size [2021-07-09 17:51:30,134 INFO L518 ElimStorePlain]: Eliminatee v_prenex_558 vanished before elimination [2021-07-09 17:51:30,134 INFO L518 ElimStorePlain]: Eliminatee v_prenex_560 vanished before elimination [2021-07-09 17:51:30,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:51:30,134 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:108, output treesize:32 [2021-07-09 17:51:30,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:30,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:30,362 INFO L628 ElimStorePlain]: treesize reduction 130, result has 47.6 percent of original size [2021-07-09 17:51:30,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:30,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:30,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:30,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:30,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:30,370 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:30,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:30,373 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:30,433 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-07-09 17:51:30,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:30,437 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:30,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:30,439 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:30,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:30,442 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:30,481 INFO L628 ElimStorePlain]: treesize reduction 25, result has 72.8 percent of original size [2021-07-09 17:51:30,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:51:30,482 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:251, output treesize:55 [2021-07-09 17:51:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:51:30,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158663293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:30,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:30,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 20 [2021-07-09 17:51:30,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888287491] [2021-07-09 17:51:30,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:51:30,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:30,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:51:30,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:51:30,576 INFO L87 Difference]: Start difference. First operand 787 states and 2386 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:31,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:31,131 INFO L93 Difference]: Finished difference Result 1112 states and 3345 transitions. [2021-07-09 17:51:31,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:51:31,131 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:31,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:31,132 INFO L225 Difference]: With dead ends: 1112 [2021-07-09 17:51:31,133 INFO L226 Difference]: Without dead ends: 1067 [2021-07-09 17:51:31,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 468.7ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:51:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-07-09 17:51:31,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 829. [2021-07-09 17:51:31,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.03743961352657) internal successors, (2515), 828 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2515 transitions. [2021-07-09 17:51:31,142 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2515 transitions. Word has length 26 [2021-07-09 17:51:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:31,142 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2515 transitions. [2021-07-09 17:51:31,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2515 transitions. [2021-07-09 17:51:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:31,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:31,143 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:31,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11500 [2021-07-09 17:51:31,359 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:31,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:31,360 INFO L82 PathProgramCache]: Analyzing trace with hash -262974914, now seen corresponding path program 464 times [2021-07-09 17:51:31,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:31,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487507158] [2021-07-09 17:51:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:31,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:31,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487507158] [2021-07-09 17:51:31,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487507158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:31,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294915541] [2021-07-09 17:51:31,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:31,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:31,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:31,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:51:31,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:31,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:31,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:31,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:31,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:31,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:31,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:31,846 INFO L628 ElimStorePlain]: treesize reduction 32, result has 67.7 percent of original size [2021-07-09 17:51:31,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:31,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:31,883 INFO L628 ElimStorePlain]: treesize reduction 22, result has 65.6 percent of original size [2021-07-09 17:51:31,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:51:31,885 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:37 [2021-07-09 17:51:32,274 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_564, ends_with_2, v_prenex_565], 1=[ends_with_6]} [2021-07-09 17:51:32,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:32,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:32,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:32,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:32,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:32,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:32,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:32,289 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:32,435 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-07-09 17:51:32,435 INFO L628 ElimStorePlain]: treesize reduction 162, result has 47.6 percent of original size [2021-07-09 17:51:32,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:32,439 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:32,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:32,443 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:32,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:32,446 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:32,552 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-07-09 17:51:32,552 INFO L628 ElimStorePlain]: treesize reduction 23, result has 83.0 percent of original size [2021-07-09 17:51:32,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_565 vanished before elimination [2021-07-09 17:51:32,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:32,556 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:32,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:32,559 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:32,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:32,563 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:32,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:32,566 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:32,639 INFO L628 ElimStorePlain]: treesize reduction 22, result has 77.3 percent of original size [2021-07-09 17:51:32,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:51:32,641 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:347, output treesize:35 [2021-07-09 17:51:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:51:32,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294915541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:32,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:32,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 20 [2021-07-09 17:51:32,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117410850] [2021-07-09 17:51:32,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:51:32,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:32,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:51:32,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:51:32,719 INFO L87 Difference]: Start difference. First operand 829 states and 2515 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:34,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:34,354 INFO L93 Difference]: Finished difference Result 1561 states and 4614 transitions. [2021-07-09 17:51:34,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:51:34,354 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:34,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:34,356 INFO L225 Difference]: With dead ends: 1561 [2021-07-09 17:51:34,356 INFO L226 Difference]: Without dead ends: 1398 [2021-07-09 17:51:34,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1362.2ms TimeCoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:51:34,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2021-07-09 17:51:34,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 888. [2021-07-09 17:51:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.059751972942503) internal successors, (2714), 887 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2714 transitions. [2021-07-09 17:51:34,368 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2714 transitions. Word has length 26 [2021-07-09 17:51:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:34,368 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 2714 transitions. [2021-07-09 17:51:34,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2714 transitions. [2021-07-09 17:51:34,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:34,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:34,369 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:34,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11560,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:34,585 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:34,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:34,585 INFO L82 PathProgramCache]: Analyzing trace with hash 758501132, now seen corresponding path program 465 times [2021-07-09 17:51:34,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:34,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445589100] [2021-07-09 17:51:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:51:34,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:34,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445589100] [2021-07-09 17:51:34,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445589100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:34,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685825429] [2021-07-09 17:51:34,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:34,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:51:34,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:34,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:51:34,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:35,425 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_2, v_prenex_566, v_prenex_567], 1=[ends_with_6]} [2021-07-09 17:51:35,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:35,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:35,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:35,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:35,540 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-07-09 17:51:35,540 INFO L628 ElimStorePlain]: treesize reduction 157, result has 39.8 percent of original size [2021-07-09 17:51:35,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:35,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:35,624 INFO L628 ElimStorePlain]: treesize reduction 22, result has 78.0 percent of original size [2021-07-09 17:51:35,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:35,627 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:35,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:35,631 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:35,696 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2021-07-09 17:51:35,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:35,700 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:35,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:35,703 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:35,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:35,706 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:35,758 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.3 percent of original size [2021-07-09 17:51:35,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:51:35,759 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:293, output treesize:32 [2021-07-09 17:51:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:51:35,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685825429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:35,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:35,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 17:51:35,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869072324] [2021-07-09 17:51:35,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:51:35,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:35,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:51:35,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:51:35,829 INFO L87 Difference]: Start difference. First operand 888 states and 2714 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:36,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:36,840 INFO L93 Difference]: Finished difference Result 1545 states and 4570 transitions. [2021-07-09 17:51:36,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:51:36,840 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:36,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:36,842 INFO L225 Difference]: With dead ends: 1545 [2021-07-09 17:51:36,842 INFO L226 Difference]: Without dead ends: 1423 [2021-07-09 17:51:36,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 979.5ms TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:51:36,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-07-09 17:51:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 903. [2021-07-09 17:51:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.0776053215077606) internal successors, (2776), 902 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 2776 transitions. [2021-07-09 17:51:36,854 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 2776 transitions. Word has length 26 [2021-07-09 17:51:36,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:36,854 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 2776 transitions. [2021-07-09 17:51:36,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 2776 transitions. [2021-07-09 17:51:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:36,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:36,855 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:37,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11656,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:37,069 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:37,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:37,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1585941072, now seen corresponding path program 466 times [2021-07-09 17:51:37,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:37,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564888641] [2021-07-09 17:51:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:51:37,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:37,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564888641] [2021-07-09 17:51:37,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564888641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:37,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014145193] [2021-07-09 17:51:37,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:37,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:37,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:37,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:51:37,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:37,861 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_2, v_prenex_568], 1=[ends_with_6]} [2021-07-09 17:51:37,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:37,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:37,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:37,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:37,974 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-07-09 17:51:37,974 INFO L628 ElimStorePlain]: treesize reduction 99, result has 52.6 percent of original size [2021-07-09 17:51:37,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:37,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:37,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:37,981 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:37,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:37,985 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:38,055 INFO L628 ElimStorePlain]: treesize reduction 26, result has 73.7 percent of original size [2021-07-09 17:51:38,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:38,059 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:38,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:38,062 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:38,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:38,066 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:38,119 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.4 percent of original size [2021-07-09 17:51:38,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:51:38,121 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:241, output treesize:35 [2021-07-09 17:51:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:51:38,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014145193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:38,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:38,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 17:51:38,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515064117] [2021-07-09 17:51:38,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:51:38,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:38,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:51:38,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:51:38,219 INFO L87 Difference]: Start difference. First operand 903 states and 2776 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:39,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:39,051 INFO L93 Difference]: Finished difference Result 1234 states and 3709 transitions. [2021-07-09 17:51:39,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:51:39,051 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:39,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:39,053 INFO L225 Difference]: With dead ends: 1234 [2021-07-09 17:51:39,053 INFO L226 Difference]: Without dead ends: 1173 [2021-07-09 17:51:39,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 885.2ms TimeCoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:51:39,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-07-09 17:51:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 887. [2021-07-09 17:51:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.0586907449209932) internal successors, (2710), 886 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2710 transitions. [2021-07-09 17:51:39,063 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2710 transitions. Word has length 26 [2021-07-09 17:51:39,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:39,063 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 2710 transitions. [2021-07-09 17:51:39,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:39,063 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2710 transitions. [2021-07-09 17:51:39,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:39,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:39,065 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:39,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11816,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:39,274 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:39,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:39,274 INFO L82 PathProgramCache]: Analyzing trace with hash -863118626, now seen corresponding path program 467 times [2021-07-09 17:51:39,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:39,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913389886] [2021-07-09 17:51:39,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:51:39,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:39,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913389886] [2021-07-09 17:51:39,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913389886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:39,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925537620] [2021-07-09 17:51:39,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:39,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:51:39,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:39,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 17:51:39,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:40,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:40,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:40,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:40,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:51:40,398 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:40,401 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:40,405 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:40,408 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:40,412 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:40,416 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:51:40,420 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:40,424 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:40,428 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:40,431 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:51:40,436 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:51:40,441 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:40,445 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:40,449 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:40,453 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:40,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:40,458 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:40,462 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,575 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-07-09 17:51:40,576 INFO L628 ElimStorePlain]: treesize reduction 61, result has 67.2 percent of original size [2021-07-09 17:51:40,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:40,580 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:40,583 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:40,586 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:40,590 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:40,667 INFO L628 ElimStorePlain]: treesize reduction 23, result has 79.3 percent of original size [2021-07-09 17:51:40,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:51:40,669 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 3 variables, input treesize:636, output treesize:56 [2021-07-09 17:51:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:40,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925537620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:40,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:40,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-07-09 17:51:40,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083868006] [2021-07-09 17:51:40,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:51:40,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:40,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:51:40,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:51:40,773 INFO L87 Difference]: Start difference. First operand 887 states and 2710 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:41,526 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-07-09 17:51:41,862 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-07-09 17:51:42,033 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-07-09 17:51:42,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:42,279 INFO L93 Difference]: Finished difference Result 1254 states and 3765 transitions. [2021-07-09 17:51:42,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:51:42,279 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:42,281 INFO L225 Difference]: With dead ends: 1254 [2021-07-09 17:51:42,281 INFO L226 Difference]: Without dead ends: 1178 [2021-07-09 17:51:42,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1561.3ms TimeCoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:51:42,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-07-09 17:51:42,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 919. [2021-07-09 17:51:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.0784313725490198) internal successors, (2826), 918 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2826 transitions. [2021-07-09 17:51:42,291 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2826 transitions. Word has length 26 [2021-07-09 17:51:42,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:42,292 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2826 transitions. [2021-07-09 17:51:42,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:42,292 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2826 transitions. [2021-07-09 17:51:42,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:42,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:42,293 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:42,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 469 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11950 [2021-07-09 17:51:42,509 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:42,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:42,509 INFO L82 PathProgramCache]: Analyzing trace with hash -35678686, now seen corresponding path program 468 times [2021-07-09 17:51:42,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:42,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819268438] [2021-07-09 17:51:42,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:51:42,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:42,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819268438] [2021-07-09 17:51:42,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819268438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:42,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983178110] [2021-07-09 17:51:42,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:42,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:51:42,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:42,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:51:42,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:43,169 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_2, v_prenex_569, v_prenex_570], 1=[ends_with_6]} [2021-07-09 17:51:43,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:43,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:43,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:43,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:43,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:43,180 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:43,183 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:43,183 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:43,186 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:43,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:43,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:43,190 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:43,266 INFO L628 ElimStorePlain]: treesize reduction 154, result has 33.0 percent of original size [2021-07-09 17:51:43,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:43,270 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:43,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:43,303 INFO L518 ElimStorePlain]: Eliminatee v_prenex_570 vanished before elimination [2021-07-09 17:51:43,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:43,306 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:43,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:43,310 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:43,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:43,313 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:43,365 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.4 percent of original size [2021-07-09 17:51:43,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:51:43,366 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:365, output treesize:35 [2021-07-09 17:51:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:51:43,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983178110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:43,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:43,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 17:51:43,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213271883] [2021-07-09 17:51:43,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:51:43,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:43,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:51:43,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:51:43,483 INFO L87 Difference]: Start difference. First operand 919 states and 2826 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:44,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:44,080 INFO L93 Difference]: Finished difference Result 1363 states and 4096 transitions. [2021-07-09 17:51:44,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:51:44,080 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:44,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:44,082 INFO L225 Difference]: With dead ends: 1363 [2021-07-09 17:51:44,082 INFO L226 Difference]: Without dead ends: 1302 [2021-07-09 17:51:44,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 722.1ms TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:51:44,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-07-09 17:51:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 887. [2021-07-09 17:51:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.0586907449209932) internal successors, (2710), 886 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2710 transitions. [2021-07-09 17:51:44,092 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2710 transitions. Word has length 26 [2021-07-09 17:51:44,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:44,093 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 2710 transitions. [2021-07-09 17:51:44,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:44,093 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2710 transitions. [2021-07-09 17:51:44,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:44,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:44,094 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:44,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12084,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:44,309 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:44,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:44,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1729871240, now seen corresponding path program 469 times [2021-07-09 17:51:44,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:44,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798456134] [2021-07-09 17:51:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:44,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:44,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798456134] [2021-07-09 17:51:44,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798456134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:44,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127319452] [2021-07-09 17:51:44,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:44,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:51:44,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:44,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:44,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:44,791 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.2 percent of original size [2021-07-09 17:51:44,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:44,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:44,865 INFO L628 ElimStorePlain]: treesize reduction 22, result has 77.1 percent of original size [2021-07-09 17:51:44,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:44,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:44,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:44,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:44,905 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:44,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:44,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:51:44,938 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:107, output treesize:59 [2021-07-09 17:51:45,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:45,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:45,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:45,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:45,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:45,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:45,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:45,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:45,212 INFO L628 ElimStorePlain]: treesize reduction 82, result has 41.4 percent of original size [2021-07-09 17:51:45,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:45,215 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:45,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:45,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:51:45,240 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:179, output treesize:37 [2021-07-09 17:51:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:51:45,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127319452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:45,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:45,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 17:51:45,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622904901] [2021-07-09 17:51:45,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:51:45,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:45,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:51:45,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:51:45,361 INFO L87 Difference]: Start difference. First operand 887 states and 2710 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:46,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:46,911 INFO L93 Difference]: Finished difference Result 1571 states and 4591 transitions. [2021-07-09 17:51:46,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:51:46,912 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:46,914 INFO L225 Difference]: With dead ends: 1571 [2021-07-09 17:51:46,914 INFO L226 Difference]: Without dead ends: 1417 [2021-07-09 17:51:46,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1152.1ms TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:51:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-07-09 17:51:46,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 945. [2021-07-09 17:51:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 3.0709745762711864) internal successors, (2899), 944 states have internal predecessors, (2899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 2899 transitions. [2021-07-09 17:51:46,926 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 2899 transitions. Word has length 26 [2021-07-09 17:51:46,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:46,926 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 2899 transitions. [2021-07-09 17:51:46,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 2899 transitions. [2021-07-09 17:51:46,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:46,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:46,927 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:47,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12148 [2021-07-09 17:51:47,129 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:47,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:47,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1129041968, now seen corresponding path program 470 times [2021-07-09 17:51:47,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:47,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340391420] [2021-07-09 17:51:47,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:47,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:47,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340391420] [2021-07-09 17:51:47,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340391420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:47,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277653148] [2021-07-09 17:51:47,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:47,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:47,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:47,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:51:47,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:47,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:47,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:47,545 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.3 percent of original size [2021-07-09 17:51:47,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:47,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:47,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:47,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:47,599 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.3 percent of original size [2021-07-09 17:51:47,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:51:47,600 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:122, output treesize:56 [2021-07-09 17:51:47,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:47,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:47,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:47,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:47,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:47,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:47,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:47,775 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:47,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:47,779 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:47,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:47,782 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:47,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:47,786 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:47,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:47,790 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:47,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:47,794 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:47,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:47,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:47,880 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:48,013 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-07-09 17:51:48,013 INFO L628 ElimStorePlain]: treesize reduction 56, result has 71.4 percent of original size [2021-07-09 17:51:48,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:48,018 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:48,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:48,021 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:48,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:48,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:48,084 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:48,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:48,087 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:48,192 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-07-09 17:51:48,192 INFO L628 ElimStorePlain]: treesize reduction 3, result has 97.6 percent of original size [2021-07-09 17:51:48,193 INFO L518 ElimStorePlain]: Eliminatee v_prenex_578 vanished before elimination [2021-07-09 17:51:48,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:51:48,194 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 6 variables, input treesize:290, output treesize:98 [2021-07-09 17:51:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:51:48,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277653148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:48,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:48,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-07-09 17:51:48,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892891410] [2021-07-09 17:51:48,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:51:48,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:48,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:51:48,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:51:48,359 INFO L87 Difference]: Start difference. First operand 945 states and 2899 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:48,909 INFO L93 Difference]: Finished difference Result 1320 states and 3975 transitions. [2021-07-09 17:51:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:51:48,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:48,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:48,911 INFO L225 Difference]: With dead ends: 1320 [2021-07-09 17:51:48,911 INFO L226 Difference]: Without dead ends: 1230 [2021-07-09 17:51:48,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 579.5ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:51:48,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-07-09 17:51:48,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 984. [2021-07-09 17:51:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 3.071210579857579) internal successors, (3019), 983 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 3019 transitions. [2021-07-09 17:51:48,923 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 3019 transitions. Word has length 26 [2021-07-09 17:51:48,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:48,923 INFO L482 AbstractCegarLoop]: Abstraction has 984 states and 3019 transitions. [2021-07-09 17:51:48,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:48,924 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 3019 transitions. [2021-07-09 17:51:48,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:48,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:48,925 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:49,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12204 [2021-07-09 17:51:49,141 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:49,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:49,141 INFO L82 PathProgramCache]: Analyzing trace with hash -992514212, now seen corresponding path program 471 times [2021-07-09 17:51:49,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:49,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979155423] [2021-07-09 17:51:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:49,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:49,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979155423] [2021-07-09 17:51:49,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979155423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:49,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896164057] [2021-07-09 17:51:49,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:49,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:51:49,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:49,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:51:49,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:49,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:49,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:49,621 INFO L628 ElimStorePlain]: treesize reduction 34, result has 74.6 percent of original size [2021-07-09 17:51:49,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:49,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:49,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:49,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:49,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:49,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:49,692 INFO L628 ElimStorePlain]: treesize reduction 22, result has 75.3 percent of original size [2021-07-09 17:51:49,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:51:49,694 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:59 [2021-07-09 17:51:49,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:49,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:49,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:49,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:49,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:49,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:49,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:51:49,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:49,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:49,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:49,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:49,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:49,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:49,963 INFO L628 ElimStorePlain]: treesize reduction 29, result has 59.7 percent of original size [2021-07-09 17:51:49,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:51:49,964 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-07-09 17:51:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:50,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896164057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:50,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:50,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 17:51:50,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191528469] [2021-07-09 17:51:50,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:51:50,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:50,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:51:50,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:51:50,031 INFO L87 Difference]: Start difference. First operand 984 states and 3019 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:52,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:52,538 INFO L93 Difference]: Finished difference Result 1733 states and 4999 transitions. [2021-07-09 17:51:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 17:51:52,538 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:52,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:52,540 INFO L225 Difference]: With dead ends: 1733 [2021-07-09 17:51:52,540 INFO L226 Difference]: Without dead ends: 1505 [2021-07-09 17:51:52,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1909.3ms TimeCoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:51:52,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-07-09 17:51:52,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1045. [2021-07-09 17:51:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.082375478927203) internal successors, (3218), 1044 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3218 transitions. [2021-07-09 17:51:52,554 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3218 transitions. Word has length 26 [2021-07-09 17:51:52,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:52,554 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 3218 transitions. [2021-07-09 17:51:52,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:52,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3218 transitions. [2021-07-09 17:51:52,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:52,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:52,555 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:52,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12264,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:52,769 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:52,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1365407616, now seen corresponding path program 472 times [2021-07-09 17:51:52,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:52,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828191794] [2021-07-09 17:51:52,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:52,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:52,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828191794] [2021-07-09 17:51:52,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828191794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:52,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416305660] [2021-07-09 17:51:52,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:53,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:53,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:53,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 17:51:53,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:53,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:53,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:53,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:53,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:53,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:53,367 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:51:53,372 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:53,376 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:51:53,381 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:53,385 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:53,390 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:53,394 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:53,398 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:53,401 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,404 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:53,405 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:53,409 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:51:53,413 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,416 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:53,417 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:51:53,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:51:53,420 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:53,579 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-07-09 17:51:53,579 INFO L628 ElimStorePlain]: treesize reduction 37, result has 82.5 percent of original size [2021-07-09 17:51:53,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 6 xjuncts. [2021-07-09 17:51:53,583 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 2 variables, input treesize:670, output treesize:166 [2021-07-09 17:51:53,867 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_586, v_prenex_587, ends_with_6], 1=[v_prenex_588, v_prenex_589]} [2021-07-09 17:51:53,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:53,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:54,030 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-07-09 17:51:54,031 INFO L628 ElimStorePlain]: treesize reduction 64, result has 70.2 percent of original size [2021-07-09 17:51:54,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:54,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:54,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:54,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:54,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:54,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:54,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:54,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:54,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:54,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:54,286 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:54,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:54,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:51:54,358 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:219, output treesize:94 [2021-07-09 17:51:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:54,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416305660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:54,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:54,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-07-09 17:51:54,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528610128] [2021-07-09 17:51:54,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:51:54,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:54,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:51:54,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:51:54,562 INFO L87 Difference]: Start difference. First operand 1045 states and 3218 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:55,651 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2021-07-09 17:51:55,922 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-07-09 17:51:56,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:56,266 INFO L93 Difference]: Finished difference Result 1524 states and 4469 transitions. [2021-07-09 17:51:56,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:51:56,267 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:51:56,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:56,269 INFO L225 Difference]: With dead ends: 1524 [2021-07-09 17:51:56,269 INFO L226 Difference]: Without dead ends: 1431 [2021-07-09 17:51:56,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1435.7ms TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:51:56,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-07-09 17:51:56,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1036. [2021-07-09 17:51:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.0647342995169082) internal successors, (3172), 1035 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3172 transitions. [2021-07-09 17:51:56,282 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3172 transitions. Word has length 26 [2021-07-09 17:51:56,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:56,282 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3172 transitions. [2021-07-09 17:51:56,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:56,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3172 transitions. [2021-07-09 17:51:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:51:56,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:56,283 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:56,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12313 [2021-07-09 17:51:56,485 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash -731556370, now seen corresponding path program 473 times [2021-07-09 17:51:56,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:56,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334799890] [2021-07-09 17:51:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:56,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:56,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334799890] [2021-07-09 17:51:56,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334799890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:56,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62610564] [2021-07-09 17:51:56,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:56,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:51:56,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:56,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:51:56,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:57,199 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_590], 1=[ends_with_2]} [2021-07-09 17:51:57,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:57,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:57,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:57,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:57,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:57,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:57,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:57,212 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:57,214 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:51:57,215 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:57,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:57,218 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:57,280 INFO L628 ElimStorePlain]: treesize reduction 106, result has 40.1 percent of original size [2021-07-09 17:51:57,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:57,283 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:57,322 INFO L628 ElimStorePlain]: treesize reduction 25, result has 63.2 percent of original size [2021-07-09 17:51:57,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:51:57,325 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:57,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:51:57,327 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:51:57,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:51:57,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:51:57,343 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:278, output treesize:20 [2021-07-09 17:51:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:51:57,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62610564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:57,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:57,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-09 17:51:57,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380544900] [2021-07-09 17:51:57,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:51:57,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:57,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:51:57,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:51:57,414 INFO L87 Difference]: Start difference. First operand 1036 states and 3172 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:00,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:00,263 INFO L93 Difference]: Finished difference Result 1630 states and 4816 transitions. [2021-07-09 17:52:00,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 17:52:00,263 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:52:00,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:00,265 INFO L225 Difference]: With dead ends: 1630 [2021-07-09 17:52:00,265 INFO L226 Difference]: Without dead ends: 1495 [2021-07-09 17:52:00,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 2111.0ms TimeCoverageRelationStatistics Valid=340, Invalid=3442, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 17:52:00,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2021-07-09 17:52:00,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1053. [2021-07-09 17:52:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 3.0693916349809887) internal successors, (3229), 1052 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3229 transitions. [2021-07-09 17:52:00,278 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3229 transitions. Word has length 26 [2021-07-09 17:52:00,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:00,278 INFO L482 AbstractCegarLoop]: Abstraction has 1053 states and 3229 transitions. [2021-07-09 17:52:00,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:00,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3229 transitions. [2021-07-09 17:52:00,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:52:00,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:00,279 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:00,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12410,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:00,496 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:00,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1451622290, now seen corresponding path program 474 times [2021-07-09 17:52:00,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:00,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292013058] [2021-07-09 17:52:00,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:52:00,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:00,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292013058] [2021-07-09 17:52:00,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292013058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:00,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284413686] [2021-07-09 17:52:00,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:00,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:52:00,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:00,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:52:00,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:00,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:00,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:00,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:00,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:00,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:00,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:00,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:00,937 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:01,010 INFO L628 ElimStorePlain]: treesize reduction 7, result has 92.7 percent of original size [2021-07-09 17:52:01,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:01,014 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:01,078 INFO L628 ElimStorePlain]: treesize reduction 21, result has 75.6 percent of original size [2021-07-09 17:52:01,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:52:01,081 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:137, output treesize:60 [2021-07-09 17:52:01,446 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_595, v_prenex_594, ends_with_10, v_prenex_593], 3=[ends_with_2]} [2021-07-09 17:52:01,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:01,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:01,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:01,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:01,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:01,460 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:01,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:01,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:01,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:01,469 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:01,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:01,473 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:01,745 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-07-09 17:52:01,745 INFO L628 ElimStorePlain]: treesize reduction 205, result has 54.6 percent of original size [2021-07-09 17:52:01,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:01,759 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:01,971 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-07-09 17:52:01,971 INFO L628 ElimStorePlain]: treesize reduction 26, result has 89.3 percent of original size [2021-07-09 17:52:01,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:01,976 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:01,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:01,980 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:01,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:01,984 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:02,171 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-07-09 17:52:02,171 INFO L628 ElimStorePlain]: treesize reduction 2, result has 99.0 percent of original size [2021-07-09 17:52:02,171 INFO L518 ElimStorePlain]: Eliminatee v_prenex_593 vanished before elimination [2021-07-09 17:52:02,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:02,176 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:02,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:02,180 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:02,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:02,183 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:02,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:02,188 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:02,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:02,191 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:02,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:02,195 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:02,337 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-09 17:52:02,337 INFO L628 ElimStorePlain]: treesize reduction 26, result has 85.6 percent of original size [2021-07-09 17:52:02,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:52:02,339 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:539, output treesize:93 [2021-07-09 17:52:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:52:02,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284413686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:02,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:02,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-07-09 17:52:02,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446231107] [2021-07-09 17:52:02,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:52:02,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:02,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:52:02,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:52:02,500 INFO L87 Difference]: Start difference. First operand 1053 states and 3229 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:03,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:03,463 INFO L93 Difference]: Finished difference Result 1451 states and 4367 transitions. [2021-07-09 17:52:03,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:52:03,463 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:52:03,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:03,486 INFO L225 Difference]: With dead ends: 1451 [2021-07-09 17:52:03,486 INFO L226 Difference]: Without dead ends: 1361 [2021-07-09 17:52:03,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 985.1ms TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:52:03,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-07-09 17:52:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1080. [2021-07-09 17:52:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 3.0695088044485637) internal successors, (3312), 1079 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 3312 transitions. [2021-07-09 17:52:03,499 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 3312 transitions. Word has length 26 [2021-07-09 17:52:03,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:03,499 INFO L482 AbstractCegarLoop]: Abstraction has 1080 states and 3312 transitions. [2021-07-09 17:52:03,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:03,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 3312 transitions. [2021-07-09 17:52:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:52:03,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:03,500 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:03,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12479 [2021-07-09 17:52:03,717 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:03,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:03,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1165536406, now seen corresponding path program 475 times [2021-07-09 17:52:03,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:03,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069601120] [2021-07-09 17:52:03,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:03,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:03,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069601120] [2021-07-09 17:52:03,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069601120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:03,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948618251] [2021-07-09 17:52:03,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:04,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:52:04,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:04,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:04,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:04,177 INFO L628 ElimStorePlain]: treesize reduction 34, result has 74.6 percent of original size [2021-07-09 17:52:04,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:04,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:04,254 INFO L628 ElimStorePlain]: treesize reduction 22, result has 77.1 percent of original size [2021-07-09 17:52:04,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:04,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:04,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:04,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:04,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:04,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:52:04,295 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:67 [2021-07-09 17:52:04,893 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_599, v_prenex_600, ends_with_6], 3=[ends_with_2]} [2021-07-09 17:52:04,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:04,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:04,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:04,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:04,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:04,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:05,126 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-07-09 17:52:05,126 INFO L628 ElimStorePlain]: treesize reduction 207, result has 48.4 percent of original size [2021-07-09 17:52:05,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:05,131 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:05,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:05,136 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:05,324 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-07-09 17:52:05,325 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.4 percent of original size [2021-07-09 17:52:05,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:05,331 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:05,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:05,335 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:05,489 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-07-09 17:52:05,489 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.9 percent of original size [2021-07-09 17:52:05,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:05,494 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:05,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:05,498 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:05,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:05,501 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:05,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:05,505 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:05,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:05,509 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:05,624 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-07-09 17:52:05,625 INFO L628 ElimStorePlain]: treesize reduction 25, result has 84.0 percent of original size [2021-07-09 17:52:05,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:52:05,627 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:443, output treesize:73 [2021-07-09 17:52:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:05,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948618251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:05,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:05,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-07-09 17:52:05,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238875370] [2021-07-09 17:52:05,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:52:05,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:05,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:52:05,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:52:05,777 INFO L87 Difference]: Start difference. First operand 1080 states and 3312 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:06,418 INFO L93 Difference]: Finished difference Result 1466 states and 4373 transitions. [2021-07-09 17:52:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:52:06,418 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:52:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:06,420 INFO L225 Difference]: With dead ends: 1466 [2021-07-09 17:52:06,420 INFO L226 Difference]: Without dead ends: 1376 [2021-07-09 17:52:06,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 679.0ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:52:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2021-07-09 17:52:06,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1092. [2021-07-09 17:52:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 3.080659945004583) internal successors, (3361), 1091 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 3361 transitions. [2021-07-09 17:52:06,433 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 3361 transitions. Word has length 26 [2021-07-09 17:52:06,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:06,433 INFO L482 AbstractCegarLoop]: Abstraction has 1092 states and 3361 transitions. [2021-07-09 17:52:06,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 3361 transitions. [2021-07-09 17:52:06,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:52:06,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:06,434 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:06,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12546 [2021-07-09 17:52:06,649 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:06,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:06,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1503399158, now seen corresponding path program 476 times [2021-07-09 17:52:06,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:06,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594451310] [2021-07-09 17:52:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:06,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:06,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594451310] [2021-07-09 17:52:06,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594451310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:06,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435844240] [2021-07-09 17:52:06,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:06,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:06,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:06,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:06,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:06,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:06,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:07,067 INFO L628 ElimStorePlain]: treesize reduction 29, result has 77.5 percent of original size [2021-07-09 17:52:07,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:07,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:07,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:07,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:07,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:07,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:07,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:07,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:07,198 INFO L628 ElimStorePlain]: treesize reduction 22, result has 75.3 percent of original size [2021-07-09 17:52:07,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:52:07,200 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:132, output treesize:67 [2021-07-09 17:52:07,569 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_605], 1=[ends_with_2]} [2021-07-09 17:52:07,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:07,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:07,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:07,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:07,670 INFO L628 ElimStorePlain]: treesize reduction 195, result has 32.1 percent of original size [2021-07-09 17:52:07,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:07,674 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:07,736 INFO L628 ElimStorePlain]: treesize reduction 24, result has 72.7 percent of original size [2021-07-09 17:52:07,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:07,740 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:07,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:07,743 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:07,780 INFO L628 ElimStorePlain]: treesize reduction 18, result has 68.4 percent of original size [2021-07-09 17:52:07,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 17:52:07,781 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:293, output treesize:20 [2021-07-09 17:52:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:07,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435844240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:07,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:07,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-07-09 17:52:07,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800603736] [2021-07-09 17:52:07,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:52:07,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:07,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:52:07,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:52:07,840 INFO L87 Difference]: Start difference. First operand 1092 states and 3361 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:08,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:08,400 INFO L93 Difference]: Finished difference Result 1348 states and 4058 transitions. [2021-07-09 17:52:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:52:08,400 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:52:08,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:08,402 INFO L225 Difference]: With dead ends: 1348 [2021-07-09 17:52:08,402 INFO L226 Difference]: Without dead ends: 1303 [2021-07-09 17:52:08,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 471.4ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:52:08,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-07-09 17:52:08,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1068. [2021-07-09 17:52:08,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 3.069353327085286) internal successors, (3275), 1067 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:08,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 3275 transitions. [2021-07-09 17:52:08,414 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 3275 transitions. Word has length 26 [2021-07-09 17:52:08,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:08,414 INFO L482 AbstractCegarLoop]: Abstraction has 1068 states and 3275 transitions. [2021-07-09 17:52:08,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:08,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 3275 transitions. [2021-07-09 17:52:08,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:52:08,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:08,415 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:08,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12749 [2021-07-09 17:52:08,632 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:08,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:08,632 INFO L82 PathProgramCache]: Analyzing trace with hash 170823402, now seen corresponding path program 477 times [2021-07-09 17:52:08,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:08,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316979249] [2021-07-09 17:52:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:52:08,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:08,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316979249] [2021-07-09 17:52:08,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316979249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:08,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74147682] [2021-07-09 17:52:08,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:08,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:52:08,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:08,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:08,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:08,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:08,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:09,082 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.4 percent of original size [2021-07-09 17:52:09,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:09,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:09,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:09,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:09,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:09,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:09,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:09,205 INFO L628 ElimStorePlain]: treesize reduction 24, result has 75.3 percent of original size [2021-07-09 17:52:09,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:52:09,207 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:115, output treesize:71 [2021-07-09 17:52:09,536 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_610, v_prenex_611, ends_with_6, v_prenex_609], 3=[ends_with_2]} [2021-07-09 17:52:09,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:09,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:09,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:09,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:09,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:09,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:09,829 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-07-09 17:52:09,829 INFO L628 ElimStorePlain]: treesize reduction 233, result has 51.2 percent of original size [2021-07-09 17:52:09,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:09,834 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:09,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:09,838 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:09,945 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-09 17:52:09,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:09,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:09,950 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:09,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:09,954 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:10,062 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-07-09 17:52:10,062 INFO L628 ElimStorePlain]: treesize reduction 122, result has 47.0 percent of original size [2021-07-09 17:52:10,062 INFO L518 ElimStorePlain]: Eliminatee v_prenex_609 vanished before elimination [2021-07-09 17:52:10,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:10,066 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:10,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:10,070 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:10,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:10,073 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:10,135 INFO L628 ElimStorePlain]: treesize reduction 24, result has 75.3 percent of original size [2021-07-09 17:52:10,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:52:10,137 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 8 variables, input treesize:522, output treesize:42 [2021-07-09 17:52:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:52:10,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74147682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:10,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:10,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-07-09 17:52:10,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72962083] [2021-07-09 17:52:10,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:52:10,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:10,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:52:10,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:52:10,247 INFO L87 Difference]: Start difference. First operand 1068 states and 3275 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:11,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:11,233 INFO L93 Difference]: Finished difference Result 1624 states and 4875 transitions. [2021-07-09 17:52:11,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:52:11,233 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:52:11,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:11,236 INFO L225 Difference]: With dead ends: 1624 [2021-07-09 17:52:11,236 INFO L226 Difference]: Without dead ends: 1579 [2021-07-09 17:52:11,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 924.1ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:52:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-07-09 17:52:11,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1095. [2021-07-09 17:52:11,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1094 states have (on average 3.0941499085923216) internal successors, (3385), 1094 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 3385 transitions. [2021-07-09 17:52:11,250 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 3385 transitions. Word has length 26 [2021-07-09 17:52:11,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:11,250 INFO L482 AbstractCegarLoop]: Abstraction has 1095 states and 3385 transitions. [2021-07-09 17:52:11,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 3385 transitions. [2021-07-09 17:52:11,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:52:11,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:11,251 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:11,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12845,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:11,465 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:11,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1991136494, now seen corresponding path program 478 times [2021-07-09 17:52:11,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:11,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109736994] [2021-07-09 17:52:11,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:11,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:11,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109736994] [2021-07-09 17:52:11,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109736994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:11,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59495508] [2021-07-09 17:52:11,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:11,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:11,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:11,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:52:11,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:11,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:11,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:11,959 INFO L628 ElimStorePlain]: treesize reduction 34, result has 74.6 percent of original size [2021-07-09 17:52:11,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:11,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:11,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:11,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:11,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:11,968 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:12,018 INFO L628 ElimStorePlain]: treesize reduction 22, result has 75.3 percent of original size [2021-07-09 17:52:12,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:52:12,020 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:59 [2021-07-09 17:52:12,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:12,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:12,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:52:12,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:12,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:12,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:12,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:52:12,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:12,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:12,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:12,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:12,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:12,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:12,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:12,212 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:12,327 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-07-09 17:52:12,327 INFO L628 ElimStorePlain]: treesize reduction 131, result has 44.3 percent of original size [2021-07-09 17:52:12,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:12,331 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:12,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:12,335 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:12,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:12,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:52:12,391 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:309, output treesize:70 [2021-07-09 17:52:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:52:12,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59495508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:12,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:12,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-07-09 17:52:12,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033879633] [2021-07-09 17:52:12,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:52:12,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:12,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:52:12,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:52:12,558 INFO L87 Difference]: Start difference. First operand 1095 states and 3385 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:14,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:14,272 INFO L93 Difference]: Finished difference Result 1718 states and 5050 transitions. [2021-07-09 17:52:14,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:52:14,273 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:52:14,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:14,275 INFO L225 Difference]: With dead ends: 1718 [2021-07-09 17:52:14,275 INFO L226 Difference]: Without dead ends: 1570 [2021-07-09 17:52:14,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1270.4ms TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:52:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2021-07-09 17:52:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 1137. [2021-07-09 17:52:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.1109154929577465) internal successors, (3534), 1136 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:14,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3534 transitions. [2021-07-09 17:52:14,290 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3534 transitions. Word has length 26 [2021-07-09 17:52:14,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:14,290 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 3534 transitions. [2021-07-09 17:52:14,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3534 transitions. [2021-07-09 17:52:14,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:52:14,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:14,291 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:14,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12906,480 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:14,495 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:14,495 INFO L82 PathProgramCache]: Analyzing trace with hash -736541266, now seen corresponding path program 479 times [2021-07-09 17:52:14,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:14,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892875303] [2021-07-09 17:52:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:52:14,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:14,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892875303] [2021-07-09 17:52:14,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892875303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:14,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552512881] [2021-07-09 17:52:14,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:14,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:52:14,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:14,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 17:52:14,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:15,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:15,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:15,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:15,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:15,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:52:15,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:15,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:15,136 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:15,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:52:15,141 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:15,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:15,145 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:15,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:52:15,148 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:15,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:52:15,152 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:15,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:15,156 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:15,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:15,159 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:15,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:15,163 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:15,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:15,166 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:15,294 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-07-09 17:52:15,295 INFO L628 ElimStorePlain]: treesize reduction 39, result has 81.2 percent of original size [2021-07-09 17:52:15,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 6 xjuncts. [2021-07-09 17:52:15,298 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:415, output treesize:152 [2021-07-09 17:52:15,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-07-09 17:52:15,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:15,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:15,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:15,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:16,072 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-07-09 17:52:16,073 INFO L628 ElimStorePlain]: treesize reduction 232, result has 43.8 percent of original size [2021-07-09 17:52:16,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:16,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:16,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:16,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:16,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:16,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:16,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:16,274 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:16,381 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-07-09 17:52:16,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:16,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 17:52:16,384 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:454, output treesize:137 [2021-07-09 17:52:16,539 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-07-09 17:52:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:16,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552512881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:16,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:16,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2021-07-09 17:52:16,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510306884] [2021-07-09 17:52:16,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:52:16,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:16,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:52:16,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:52:16,668 INFO L87 Difference]: Start difference. First operand 1137 states and 3534 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:17,841 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-07-09 17:52:18,024 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-07-09 17:52:18,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:18,029 INFO L93 Difference]: Finished difference Result 1462 states and 4380 transitions. [2021-07-09 17:52:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:52:18,029 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:52:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:18,031 INFO L225 Difference]: With dead ends: 1462 [2021-07-09 17:52:18,031 INFO L226 Difference]: Without dead ends: 1369 [2021-07-09 17:52:18,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1422.8ms TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:52:18,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-07-09 17:52:18,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1150. [2021-07-09 17:52:18,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.1070496083550916) internal successors, (3570), 1149 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3570 transitions. [2021-07-09 17:52:18,045 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3570 transitions. Word has length 26 [2021-07-09 17:52:18,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:18,045 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3570 transitions. [2021-07-09 17:52:18,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3570 transitions. [2021-07-09 17:52:18,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:52:18,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:18,046 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:18,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12978,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:18,247 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:18,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:18,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1972790186, now seen corresponding path program 480 times [2021-07-09 17:52:18,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:18,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096839774] [2021-07-09 17:52:18,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:52:18,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:18,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096839774] [2021-07-09 17:52:18,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096839774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:18,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713537053] [2021-07-09 17:52:18,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:18,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:52:18,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:18,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:18,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:18,970 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_2, v_prenex_621, v_prenex_622], 1=[ends_with_6]} [2021-07-09 17:52:18,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:18,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:18,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:18,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:19,069 INFO L628 ElimStorePlain]: treesize reduction 90, result has 52.1 percent of original size [2021-07-09 17:52:19,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:19,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:19,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:19,076 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:19,141 INFO L628 ElimStorePlain]: treesize reduction 22, result has 75.8 percent of original size [2021-07-09 17:52:19,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:19,145 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:19,201 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.5 percent of original size [2021-07-09 17:52:19,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:19,204 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:19,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:19,207 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:19,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:19,210 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:19,253 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.1 percent of original size [2021-07-09 17:52:19,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:52:19,254 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:217, output treesize:26 [2021-07-09 17:52:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:52:19,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713537053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:19,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:19,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 17:52:19,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954706329] [2021-07-09 17:52:19,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:52:19,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:19,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:52:19,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:52:19,315 INFO L87 Difference]: Start difference. First operand 1150 states and 3570 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:19,673 INFO L93 Difference]: Finished difference Result 1603 states and 4910 transitions. [2021-07-09 17:52:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:52:19,673 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:52:19,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:19,675 INFO L225 Difference]: With dead ends: 1603 [2021-07-09 17:52:19,675 INFO L226 Difference]: Without dead ends: 1542 [2021-07-09 17:52:19,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 444.8ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:52:19,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-07-09 17:52:19,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1180. [2021-07-09 17:52:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.1085665818490247) internal successors, (3665), 1179 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3665 transitions. [2021-07-09 17:52:19,690 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3665 transitions. Word has length 26 [2021-07-09 17:52:19,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:19,690 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3665 transitions. [2021-07-09 17:52:19,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:19,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3665 transitions. [2021-07-09 17:52:19,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:52:19,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:19,692 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:19,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13096,482 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:19,896 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:19,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1081521126, now seen corresponding path program 481 times [2021-07-09 17:52:19,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:19,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772467844] [2021-07-09 17:52:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:20,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:20,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772467844] [2021-07-09 17:52:20,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772467844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:20,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054039184] [2021-07-09 17:52:20,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:20,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 17:52:20,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:20,658 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_2, v_prenex_623, v_prenex_624], 1=[ends_with_6]} [2021-07-09 17:52:20,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:20,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:20,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:20,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:20,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:20,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:20,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:20,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:20,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:20,680 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:20,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:20,683 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:20,764 INFO L628 ElimStorePlain]: treesize reduction 175, result has 29.4 percent of original size [2021-07-09 17:52:20,764 INFO L518 ElimStorePlain]: Eliminatee v_prenex_623 vanished before elimination [2021-07-09 17:52:20,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:20,767 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:20,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:20,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:20,804 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:20,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:20,807 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:20,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:20,820 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:20,872 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.3 percent of original size [2021-07-09 17:52:20,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:52:20,873 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:347, output treesize:32 [2021-07-09 17:52:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:52:20,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054039184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:20,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:20,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:52:20,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740594680] [2021-07-09 17:52:20,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:20,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:20,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:20,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:20,947 INFO L87 Difference]: Start difference. First operand 1180 states and 3665 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:22,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:22,210 INFO L93 Difference]: Finished difference Result 1896 states and 5778 transitions. [2021-07-09 17:52:22,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:52:22,211 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:52:22,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:22,214 INFO L225 Difference]: With dead ends: 1896 [2021-07-09 17:52:22,214 INFO L226 Difference]: Without dead ends: 1835 [2021-07-09 17:52:22,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1218.0ms TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:52:22,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2021-07-09 17:52:22,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1209. [2021-07-09 17:52:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 3.1332781456953644) internal successors, (3785), 1208 states have internal predecessors, (3785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:22,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 3785 transitions. [2021-07-09 17:52:22,230 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 3785 transitions. Word has length 26 [2021-07-09 17:52:22,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:22,230 INFO L482 AbstractCegarLoop]: Abstraction has 1209 states and 3785 transitions. [2021-07-09 17:52:22,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:22,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 3785 transitions. [2021-07-09 17:52:22,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:52:22,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:22,232 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:22,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13195,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:22,437 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:22,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:22,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2142682390, now seen corresponding path program 482 times [2021-07-09 17:52:22,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:22,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578719941] [2021-07-09 17:52:22,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:22,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:22,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578719941] [2021-07-09 17:52:22,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578719941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:22,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174348571] [2021-07-09 17:52:22,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:22,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:22,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:22,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:52:22,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:23,258 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_2, v_prenex_625, v_prenex_627, v_prenex_626, v_prenex_628], 1=[ends_with_6]} [2021-07-09 17:52:23,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:23,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:23,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:23,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:23,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:23,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:23,487 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-07-09 17:52:23,488 INFO L628 ElimStorePlain]: treesize reduction 245, result has 44.6 percent of original size [2021-07-09 17:52:23,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:23,492 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:23,659 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-09 17:52:23,659 INFO L628 ElimStorePlain]: treesize reduction 29, result has 85.1 percent of original size [2021-07-09 17:52:23,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:23,664 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:23,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:23,667 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:23,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:23,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_626 vanished before elimination [2021-07-09 17:52:23,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:23,748 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:23,872 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-07-09 17:52:23,872 INFO L628 ElimStorePlain]: treesize reduction 26, result has 83.2 percent of original size [2021-07-09 17:52:23,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:23,876 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:23,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:23,880 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:23,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:23,883 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:23,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:23,887 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:23,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:23,890 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:23,990 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-07-09 17:52:23,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 17:52:23,991 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 7 variables, input treesize:479, output treesize:67 [2021-07-09 17:52:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:24,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174348571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:24,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:24,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-07-09 17:52:24,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158682026] [2021-07-09 17:52:24,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:52:24,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:24,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:52:24,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:52:24,128 INFO L87 Difference]: Start difference. First operand 1209 states and 3785 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:25,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:25,720 INFO L93 Difference]: Finished difference Result 1923 states and 5886 transitions. [2021-07-09 17:52:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:52:25,720 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:52:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:25,723 INFO L225 Difference]: With dead ends: 1923 [2021-07-09 17:52:25,723 INFO L226 Difference]: Without dead ends: 1823 [2021-07-09 17:52:25,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1572.4ms TimeCoverageRelationStatistics Valid=216, Invalid=1764, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:52:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-07-09 17:52:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1211. [2021-07-09 17:52:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 3.134710743801653) internal successors, (3793), 1210 states have internal predecessors, (3793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 3793 transitions. [2021-07-09 17:52:25,739 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 3793 transitions. Word has length 26 [2021-07-09 17:52:25,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:25,739 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 3793 transitions. [2021-07-09 17:52:25,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 3793 transitions. [2021-07-09 17:52:25,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:52:25,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:25,740 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:25,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13273,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:25,950 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:25,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:25,950 INFO L82 PathProgramCache]: Analyzing trace with hash -848705770, now seen corresponding path program 483 times [2021-07-09 17:52:25,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:25,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310864380] [2021-07-09 17:52:25,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:26,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:26,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310864380] [2021-07-09 17:52:26,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310864380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:26,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45461730] [2021-07-09 17:52:26,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:26,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:52:26,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:26,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 17:52:26,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:26,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:26,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:26,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:26,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:26,682 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:26,687 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:52:26,692 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:26,696 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:26,700 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,703 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:26,703 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:26,708 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:26,741 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:52:26,746 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:26,757 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:52:26,761 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:26,766 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:26,770 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:52:26,775 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:26,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:26,779 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,782 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:26,783 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:26,785 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:26,786 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:27,005 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-07-09 17:52:27,005 INFO L628 ElimStorePlain]: treesize reduction 37, result has 86.5 percent of original size [2021-07-09 17:52:27,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 8 xjuncts. [2021-07-09 17:52:27,010 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 2 variables, input treesize:715, output treesize:221 [2021-07-09 17:52:28,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:28,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:28,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:52:28,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:28,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:28,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:28,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:52:28,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:28,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:28,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:28,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:28,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:28,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:28,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:28,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:28,524 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 89 [2021-07-09 17:52:28,525 INFO L628 ElimStorePlain]: treesize reduction 325, result has 46.5 percent of original size [2021-07-09 17:52:28,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:28,530 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:28,662 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-09 17:52:28,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:28,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:28,668 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:28,798 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-09 17:52:28,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:28,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:28,804 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:28,941 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-07-09 17:52:28,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:28,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:28,946 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:28,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:28,950 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:29,057 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-07-09 17:52:29,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:29,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:29,062 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:29,167 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-07-09 17:52:29,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:29,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-07-09 17:52:29,170 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 12 variables, input treesize:698, output treesize:191 [2021-07-09 17:52:29,297 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-07-09 17:52:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:29,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45461730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:29,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:29,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-07-09 17:52:29,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546964997] [2021-07-09 17:52:29,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:52:29,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:29,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:52:29,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:52:29,410 INFO L87 Difference]: Start difference. First operand 1211 states and 3793 transitions. Second operand has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:30,325 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-07-09 17:52:30,663 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-07-09 17:52:30,842 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-07-09 17:52:31,044 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-07-09 17:52:31,265 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-07-09 17:52:31,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:31,309 INFO L93 Difference]: Finished difference Result 1648 states and 5042 transitions. [2021-07-09 17:52:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:52:31,309 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:52:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:31,311 INFO L225 Difference]: With dead ends: 1648 [2021-07-09 17:52:31,311 INFO L226 Difference]: Without dead ends: 1543 [2021-07-09 17:52:31,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1963.8ms TimeCoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:52:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-07-09 17:52:31,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1180. [2021-07-09 17:52:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.1085665818490247) internal successors, (3665), 1179 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:31,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3665 transitions. [2021-07-09 17:52:31,325 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3665 transitions. Word has length 26 [2021-07-09 17:52:31,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:31,326 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3665 transitions. [2021-07-09 17:52:31,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:31,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3665 transitions. [2021-07-09 17:52:31,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:52:31,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:31,327 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:31,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13318,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:31,543 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:31,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:31,544 INFO L82 PathProgramCache]: Analyzing trace with hash -809492020, now seen corresponding path program 484 times [2021-07-09 17:52:31,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:31,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550468885] [2021-07-09 17:52:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:52:31,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:31,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550468885] [2021-07-09 17:52:31,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550468885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:31,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338411047] [2021-07-09 17:52:31,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:31,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:31,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:31,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:52:31,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:32,413 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_640, ends_with_2, v_prenex_639], 1=[ends_with_6]} [2021-07-09 17:52:32,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:32,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:32,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:32,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:32,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:32,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:32,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:32,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:32,508 INFO L628 ElimStorePlain]: treesize reduction 87, result has 46.3 percent of original size [2021-07-09 17:52:32,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:32,512 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:32,577 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2021-07-09 17:52:32,577 INFO L518 ElimStorePlain]: Eliminatee v_prenex_639 vanished before elimination [2021-07-09 17:52:32,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:32,580 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:32,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:32,583 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:32,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:32,586 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:32,637 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.3 percent of original size [2021-07-09 17:52:32,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:52:32,638 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:229, output treesize:32 [2021-07-09 17:52:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:32,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338411047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:32,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:32,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-07-09 17:52:32,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048171911] [2021-07-09 17:52:32,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:52:32,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:32,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:52:32,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:52:32,711 INFO L87 Difference]: Start difference. First operand 1180 states and 3665 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:33,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:33,575 INFO L93 Difference]: Finished difference Result 1385 states and 4264 transitions. [2021-07-09 17:52:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:52:33,575 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:52:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:33,578 INFO L225 Difference]: With dead ends: 1385 [2021-07-09 17:52:33,578 INFO L226 Difference]: Without dead ends: 1335 [2021-07-09 17:52:33,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 852.0ms TimeCoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:52:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2021-07-09 17:52:33,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1185. [2021-07-09 17:52:33,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 3.1089527027027026) internal successors, (3681), 1184 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 3681 transitions. [2021-07-09 17:52:33,591 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 3681 transitions. Word has length 26 [2021-07-09 17:52:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:33,591 INFO L482 AbstractCegarLoop]: Abstraction has 1185 states and 3681 transitions. [2021-07-09 17:52:33,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 3681 transitions. [2021-07-09 17:52:33,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:52:33,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:33,593 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:33,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13448 [2021-07-09 17:52:33,809 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:33,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:33,809 INFO L82 PathProgramCache]: Analyzing trace with hash -663398960, now seen corresponding path program 485 times [2021-07-09 17:52:33,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:33,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702580288] [2021-07-09 17:52:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:33,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:33,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702580288] [2021-07-09 17:52:33,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702580288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:33,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143771706] [2021-07-09 17:52:33,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:34,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:52:34,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:34,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:34,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:34,485 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_641, ends_with_2, v_prenex_642], 1=[ends_with_6]} [2021-07-09 17:52:34,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:34,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:34,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:34,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:34,588 INFO L628 ElimStorePlain]: treesize reduction 151, result has 39.4 percent of original size [2021-07-09 17:52:34,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:34,591 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:34,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:34,594 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:34,657 INFO L628 ElimStorePlain]: treesize reduction 23, result has 74.4 percent of original size [2021-07-09 17:52:34,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:34,660 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:34,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:34,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:34,692 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:34,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:34,694 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:34,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:34,697 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:34,739 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.1 percent of original size [2021-07-09 17:52:34,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:52:34,740 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 5 variables, input treesize:278, output treesize:26 [2021-07-09 17:52:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:34,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143771706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:34,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:34,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:52:34,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198084682] [2021-07-09 17:52:34,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:34,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:34,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:34,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:34,805 INFO L87 Difference]: Start difference. First operand 1185 states and 3681 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:35,607 INFO L93 Difference]: Finished difference Result 1517 states and 4653 transitions. [2021-07-09 17:52:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:52:35,607 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:52:35,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:35,610 INFO L225 Difference]: With dead ends: 1517 [2021-07-09 17:52:35,610 INFO L226 Difference]: Without dead ends: 1456 [2021-07-09 17:52:35,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 722.0ms TimeCoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:52:35,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-07-09 17:52:35,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1225. [2021-07-09 17:52:35,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1224 states have (on average 3.122549019607843) internal successors, (3822), 1224 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:35,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 3822 transitions. [2021-07-09 17:52:35,624 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 3822 transitions. Word has length 26 [2021-07-09 17:52:35,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:35,624 INFO L482 AbstractCegarLoop]: Abstraction has 1225 states and 3822 transitions. [2021-07-09 17:52:35,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:35,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 3822 transitions. [2021-07-09 17:52:35,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:52:35,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:35,626 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:35,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13552,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:35,841 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:35,841 INFO L82 PathProgramCache]: Analyzing trace with hash 261271760, now seen corresponding path program 486 times [2021-07-09 17:52:35,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:35,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713733616] [2021-07-09 17:52:35,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:36,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:36,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713733616] [2021-07-09 17:52:36,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713733616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:36,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711882086] [2021-07-09 17:52:36,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:36,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:52:36,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:36,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:52:36,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:36,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:36,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:36,434 INFO L628 ElimStorePlain]: treesize reduction 74, result has 57.5 percent of original size [2021-07-09 17:52:36,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:36,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:36,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:36,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:36,528 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.7 percent of original size [2021-07-09 17:52:36,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 17:52:36,530 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:177, output treesize:81 [2021-07-09 17:52:36,941 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_2, v_prenex_645, v_prenex_647, v_prenex_646], 3=[ends_with_6]} [2021-07-09 17:52:36,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:36,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:36,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:36,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:36,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:36,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:37,233 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-07-09 17:52:37,233 INFO L628 ElimStorePlain]: treesize reduction 192, result has 59.5 percent of original size [2021-07-09 17:52:37,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:37,238 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:37,477 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-07-09 17:52:37,478 INFO L628 ElimStorePlain]: treesize reduction 35, result has 87.4 percent of original size [2021-07-09 17:52:37,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:37,482 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:37,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:37,486 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:37,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:37,490 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:37,686 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-07-09 17:52:37,686 INFO L628 ElimStorePlain]: treesize reduction 2, result has 99.1 percent of original size [2021-07-09 17:52:37,686 INFO L518 ElimStorePlain]: Eliminatee v_prenex_646 vanished before elimination [2021-07-09 17:52:37,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:37,691 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:37,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:37,695 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:37,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:37,699 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:37,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:37,703 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:37,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:37,707 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:37,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:37,711 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:37,861 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-07-09 17:52:37,861 INFO L628 ElimStorePlain]: treesize reduction 28, result has 86.4 percent of original size [2021-07-09 17:52:37,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 17:52:37,864 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 8 variables, input treesize:483, output treesize:88 [2021-07-09 17:52:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:38,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711882086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:38,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:38,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 23 [2021-07-09 17:52:38,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682118767] [2021-07-09 17:52:38,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:38,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:38,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:38,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:38,034 INFO L87 Difference]: Start difference. First operand 1225 states and 3822 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:39,636 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-07-09 17:52:40,052 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-07-09 17:52:40,367 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-07-09 17:52:40,627 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-07-09 17:52:40,970 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-07-09 17:52:41,196 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-07-09 17:52:41,361 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-07-09 17:52:41,512 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-07-09 17:52:41,819 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-07-09 17:52:41,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:41,826 INFO L93 Difference]: Finished difference Result 2026 states and 6010 transitions. [2021-07-09 17:52:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:52:41,826 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:52:41,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:41,829 INFO L225 Difference]: With dead ends: 2026 [2021-07-09 17:52:41,829 INFO L226 Difference]: Without dead ends: 1863 [2021-07-09 17:52:41,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 3156.5ms TimeCoverageRelationStatistics Valid=325, Invalid=2431, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:52:41,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-07-09 17:52:41,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1264. [2021-07-09 17:52:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.1504354711005544) internal successors, (3979), 1263 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 3979 transitions. [2021-07-09 17:52:41,845 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 3979 transitions. Word has length 26 [2021-07-09 17:52:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:41,846 INFO L482 AbstractCegarLoop]: Abstraction has 1264 states and 3979 transitions. [2021-07-09 17:52:41,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 3979 transitions. [2021-07-09 17:52:41,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:52:41,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:41,847 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:42,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13614 [2021-07-09 17:52:42,064 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:42,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:42,064 INFO L82 PathProgramCache]: Analyzing trace with hash 217543726, now seen corresponding path program 487 times [2021-07-09 17:52:42,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:42,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239245558] [2021-07-09 17:52:42,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:42,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:42,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239245558] [2021-07-09 17:52:42,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239245558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:42,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078679119] [2021-07-09 17:52:42,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:42,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:42,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:42,715 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_650, v_prenex_651, ends_with_2, v_prenex_649, v_prenex_648], 1=[ends_with_6]} [2021-07-09 17:52:42,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:42,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:42,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:42,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:42,811 INFO L628 ElimStorePlain]: treesize reduction 181, result has 30.9 percent of original size [2021-07-09 17:52:42,812 INFO L518 ElimStorePlain]: Eliminatee v_prenex_651 vanished before elimination [2021-07-09 17:52:42,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:42,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:42,888 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.7 percent of original size [2021-07-09 17:52:42,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:42,891 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:42,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:52:42,925 INFO L518 ElimStorePlain]: Eliminatee v_prenex_648 vanished before elimination [2021-07-09 17:52:42,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:42,928 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:42,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:42,931 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:42,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:42,934 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:42,987 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.4 percent of original size [2021-07-09 17:52:42,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 17:52:42,988 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 7 variables, input treesize:298, output treesize:35 [2021-07-09 17:52:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:52:43,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078679119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:43,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:43,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:52:43,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071535379] [2021-07-09 17:52:43,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:43,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:43,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:43,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:43,094 INFO L87 Difference]: Start difference. First operand 1264 states and 3979 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:43,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:43,969 INFO L93 Difference]: Finished difference Result 1636 states and 5055 transitions. [2021-07-09 17:52:43,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:52:43,969 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:52:43,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:43,972 INFO L225 Difference]: With dead ends: 1636 [2021-07-09 17:52:43,972 INFO L226 Difference]: Without dead ends: 1575 [2021-07-09 17:52:43,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 858.8ms TimeCoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:52:43,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-07-09 17:52:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1234. [2021-07-09 17:52:43,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 3.1419302514193026) internal successors, (3874), 1233 states have internal predecessors, (3874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:43,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 3874 transitions. [2021-07-09 17:52:43,986 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 3874 transitions. Word has length 26 [2021-07-09 17:52:43,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:43,986 INFO L482 AbstractCegarLoop]: Abstraction has 1234 states and 3874 transitions. [2021-07-09 17:52:43,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:43,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 3874 transitions. [2021-07-09 17:52:43,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:52:43,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:43,987 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:44,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13678 [2021-07-09 17:52:44,201 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:44,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:44,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1179842058, now seen corresponding path program 488 times [2021-07-09 17:52:44,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:44,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763696500] [2021-07-09 17:52:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:44,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:44,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763696500] [2021-07-09 17:52:44,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763696500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:44,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857772456] [2021-07-09 17:52:44,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:44,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:44,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:44,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:52:44,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:44,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 17:52:44,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:44,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:44,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:44,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-07-09 17:52:44,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:44,692 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-07-09 17:52:44,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-07-09 17:52:44,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:44,724 INFO L628 ElimStorePlain]: treesize reduction 20, result has 65.5 percent of original size [2021-07-09 17:52:44,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-07-09 17:52:44,725 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:127, output treesize:30 [2021-07-09 17:52:44,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:44,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:44,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:52:44,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:44,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:44,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:44,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:44,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:44,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:44,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:44,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-07-09 17:52:44,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:44,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:52:44,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-07-09 17:52:44,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 17:52:44,903 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.7 percent of original size [2021-07-09 17:52:44,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 17:52:44,904 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:163, output treesize:47 [2021-07-09 17:52:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:52:45,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857772456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:45,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:45,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 17:52:45,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694362293] [2021-07-09 17:52:45,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:45,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:45,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:45,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:45,028 INFO L87 Difference]: Start difference. First operand 1234 states and 3874 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-09 17:52:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:52:46,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13725 [2021-07-09 17:52:46,339 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 17:52:46,341 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:52:46,342 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 17:52:46,342 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:52:46 BasicIcfg [2021-07-09 17:52:46,342 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:52:46,342 INFO L168 Benchmark]: Toolchain (without parser) took 941900.21 ms. Allocated memory was 197.1 MB in the beginning and 823.1 MB in the end (delta: 626.0 MB). Free memory was 176.5 MB in the beginning and 546.4 MB in the end (delta: -369.9 MB). Peak memory consumption was 257.5 MB. Max. memory is 8.0 GB. [2021-07-09 17:52:46,342 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 197.1 MB. Free memory is still 177.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:52:46,342 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.25 ms. Allocated memory is still 197.1 MB. Free memory was 176.5 MB in the beginning and 174.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 17:52:46,343 INFO L168 Benchmark]: Boogie Preprocessor took 13.73 ms. Allocated memory is still 197.1 MB. Free memory was 174.8 MB in the beginning and 173.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:52:46,343 INFO L168 Benchmark]: RCFGBuilder took 415.32 ms. Allocated memory is still 197.1 MB. Free memory was 173.7 MB in the beginning and 174.8 MB in the end (delta: -1.1 MB). Peak memory consumption was 36.2 MB. Max. memory is 8.0 GB. [2021-07-09 17:52:46,343 INFO L168 Benchmark]: TraceAbstraction took 941448.41 ms. Allocated memory was 197.1 MB in the beginning and 823.1 MB in the end (delta: 626.0 MB). Free memory was 174.3 MB in the beginning and 546.4 MB in the end (delta: -372.1 MB). Peak memory consumption was 253.9 MB. Max. memory is 8.0 GB. [2021-07-09 17:52:46,343 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 197.1 MB. Free memory is still 177.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.25 ms. Allocated memory is still 197.1 MB. Free memory was 176.5 MB in the beginning and 174.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.73 ms. Allocated memory is still 197.1 MB. Free memory was 174.8 MB in the beginning and 173.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 415.32 ms. Allocated memory is still 197.1 MB. Free memory was 173.7 MB in the beginning and 174.8 MB in the end (delta: -1.1 MB). Peak memory consumption was 36.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 941448.41 ms. Allocated memory was 197.1 MB in the beginning and 823.1 MB in the end (delta: 626.0 MB). Free memory was 174.3 MB in the beginning and 546.4 MB in the end (delta: -372.1 MB). Peak memory consumption was 253.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1234states) and FLOYD_HOARE automaton (currently 31 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 43 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 941386.2ms, OverallIterations: 505, TraceHistogramMax: 3, EmptinessCheckTime: 527.3ms, AutomataDifference: 553037.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 47259 SDtfs, 74655 SDslu, 370701 SDs, 0 SdLazy, 367024 SolverSat, 17685 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 154276.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30289 GetRequests, 12121 SyntacticMatches, 493 SemanticMatches, 17674 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226026 ImplicationChecksByTransitivity, 457775.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1764occurred in iteration=303, InterpolantAutomatonStates: 14189, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5483.3ms AutomataMinimizationTime, 504 MinimizatonAttempts, 184509 StatesRemovedByMinimization, 500 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3145.1ms SsaConstructionTime, 8000.8ms SatisfiabilityAnalysisTime, 224614.4ms InterpolantComputationTime, 22965 NumberOfCodeBlocks, 22947 NumberOfCodeBlocksAsserted, 1658 NumberOfCheckSat, 21971 ConstructedInterpolants, 1039 QuantifiedInterpolants, 205556 SizeOfPredicates, 2922 NumberOfNonLiveVariables, 55160 ConjunctsInSsa, 10355 ConjunctsInUnsatCore, 994 InterpolantComputations, 16 PerfectInterpolantSequences, 2268/10047 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown