/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/popl20-more/buffer-series-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:22:19,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:22:19,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:22:19,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:22:19,209 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 18:22:19,255 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:22:19,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:22:19,256 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:22:19,256 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:22:19,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:22:19,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:22:19,259 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:22:19,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:22:19,259 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:22:19,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:22:19,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:22:19,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:22:19,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:22:19,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:22:19,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:22:19,260 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:22:19,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:22:19,260 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:22:19,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:22:19,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:22:19,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:22:19,261 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:22:19,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:22:19,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:22:19,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:22:19,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:22:19,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:22:19,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:22:19,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:22:19,262 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:22:19,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:22:19,262 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:22:19,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:22:19,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:22:19,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:22:19,502 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:22:19,503 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:22:19,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl [2021-07-09 18:22:19,503 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl' [2021-07-09 18:22:19,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:22:19,545 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:22:19,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:22:19,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:22:19,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:22:19,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:19" (1/1) ... [2021-07-09 18:22:19,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:19" (1/1) ... [2021-07-09 18:22:19,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:22:19,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:22:19,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:22:19,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:22:19,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:19" (1/1) ... [2021-07-09 18:22:19,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:19" (1/1) ... [2021-07-09 18:22:19,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:19" (1/1) ... [2021-07-09 18:22:19,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:19" (1/1) ... [2021-07-09 18:22:19,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:19" (1/1) ... [2021-07-09 18:22:19,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:19" (1/1) ... [2021-07-09 18:22:19,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:19" (1/1) ... [2021-07-09 18:22:19,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:22:19,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:22:19,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:22:19,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:22:19,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:19" (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 18:22:19,655 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:22:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:22:19,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:22:19,655 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:22:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:22:19,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:22:19,656 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:22:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:22:19,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:22:19,656 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:22:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:22:19,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:22:19,656 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-09 18:22:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-09 18:22:19,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-09 18:22:19,657 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 18:22:19,850 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:22:19,850 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:22:19,851 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:22:19 BoogieIcfgContainer [2021-07-09 18:22:19,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:22:19,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:22:19,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:22:19,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:22:19,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:22:19" (1/2) ... [2021-07-09 18:22:19,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d76175 and model type buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:22:19, skipping insertion in model container [2021-07-09 18:22:19,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:22:19" (2/2) ... [2021-07-09 18:22:19,856 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series-array.wvr.bpl [2021-07-09 18:22:19,859 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:22:19,860 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:22:19,860 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:22:19,860 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:22:19,892 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 18:22:19,907 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-09 18:22:19,919 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:22:19,919 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:22:19,919 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:22:19,919 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:22:19,919 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:22:19,919 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:22:19,919 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:22:19,920 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:22:19,926 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-07-09 18:22:20,006 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:20,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:22:20,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:20,037 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:20,037 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:20,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:20,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1591089523, now seen corresponding path program 1 times [2021-07-09 18:22:20,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:20,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100594194] [2021-07-09 18:22:20,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:20,140 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 18:22:20,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:20,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100594194] [2021-07-09 18:22:20,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100594194] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:20,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:20,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:22:20,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036996394] [2021-07-09 18:22:20,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:22:20,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:20,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:22:20,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:22:20,154 INFO L87 Difference]: Start difference. First operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:20,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:20,198 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-07-09 18:22:20,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:22:20,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:22:20,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:20,219 INFO L225 Difference]: With dead ends: 1236 [2021-07-09 18:22:20,219 INFO L226 Difference]: Without dead ends: 1109 [2021-07-09 18:22:20,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:22:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-07-09 18:22:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-07-09 18:22:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-07-09 18:22:20,317 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-07-09 18:22:20,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:20,317 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-07-09 18:22:20,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:20,318 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-07-09 18:22:20,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:22:20,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:20,321 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, 1] [2021-07-09 18:22:20,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:22:20,321 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:20,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:20,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1256412427, now seen corresponding path program 1 times [2021-07-09 18:22:20,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:20,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116056189] [2021-07-09 18:22:20,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:20,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:20,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116056189] [2021-07-09 18:22:20,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116056189] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:20,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:20,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:22:20,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355810289] [2021-07-09 18:22:20,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:20,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:20,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:20,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:20,366 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:20,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:20,423 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-07-09 18:22:20,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:22:20,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 18:22:20,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:20,431 INFO L225 Difference]: With dead ends: 1524 [2021-07-09 18:22:20,431 INFO L226 Difference]: Without dead ends: 1418 [2021-07-09 18:22:20,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:20,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-07-09 18:22:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-07-09 18:22:20,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:20,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-07-09 18:22:20,494 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-07-09 18:22:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:20,494 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-07-09 18:22:20,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-07-09 18:22:20,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:22:20,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:20,498 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, 1] [2021-07-09 18:22:20,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:22:20,499 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:20,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:20,499 INFO L82 PathProgramCache]: Analyzing trace with hash -898961871, now seen corresponding path program 1 times [2021-07-09 18:22:20,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:20,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469252309] [2021-07-09 18:22:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:20,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:20,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469252309] [2021-07-09 18:22:20,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469252309] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:20,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:20,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:22:20,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683660255] [2021-07-09 18:22:20,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:20,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:20,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:20,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:20,575 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:20,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:20,630 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-07-09 18:22:20,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:22:20,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 18:22:20,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:20,647 INFO L225 Difference]: With dead ends: 2017 [2021-07-09 18:22:20,648 INFO L226 Difference]: Without dead ends: 1875 [2021-07-09 18:22:20,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:20,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-07-09 18:22:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-07-09 18:22:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-07-09 18:22:20,700 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-07-09 18:22:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:20,701 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-07-09 18:22:20,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:20,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-07-09 18:22:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:22:20,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:20,707 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, 1, 1, 1, 1] [2021-07-09 18:22:20,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:22:20,707 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:20,708 INFO L82 PathProgramCache]: Analyzing trace with hash 100882901, now seen corresponding path program 1 times [2021-07-09 18:22:20,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:20,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014548498] [2021-07-09 18:22:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:20,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:20,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014548498] [2021-07-09 18:22:20,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014548498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:20,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621087554] [2021-07-09 18:22:20,743 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 18:22:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:20,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:22:20,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:21,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621087554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:21,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:21,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-07-09 18:22:21,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204060213] [2021-07-09 18:22:21,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:22:21,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:21,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:22:21,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:22:21,025 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 18:22:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:21,140 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-07-09 18:22:21,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:22:21,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 24 [2021-07-09 18:22:21,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:21,167 INFO L225 Difference]: With dead ends: 2308 [2021-07-09 18:22:21,167 INFO L226 Difference]: Without dead ends: 2108 [2021-07-09 18:22:21,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:22:21,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-07-09 18:22:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-07-09 18:22:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-07-09 18:22:21,269 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-07-09 18:22:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:21,270 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-07-09 18:22:21,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 18:22:21,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-07-09 18:22:21,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:22:21,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:21,276 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, 1, 1, 1, 1] [2021-07-09 18:22:21,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:21,477 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:21,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:21,478 INFO L82 PathProgramCache]: Analyzing trace with hash -239710988, now seen corresponding path program 1 times [2021-07-09 18:22:21,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:21,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058416267] [2021-07-09 18:22:21,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:21,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:21,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058416267] [2021-07-09 18:22:21,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058416267] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:21,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:21,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:22:21,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857297706] [2021-07-09 18:22:21,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:21,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:21,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:21,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:21,507 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:21,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:21,588 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-07-09 18:22:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:22:21,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 18:22:21,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:21,597 INFO L225 Difference]: With dead ends: 1950 [2021-07-09 18:22:21,597 INFO L226 Difference]: Without dead ends: 1860 [2021-07-09 18:22:21,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-07-09 18:22:21,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-07-09 18:22:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-07-09 18:22:21,640 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-07-09 18:22:21,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:21,640 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-07-09 18:22:21,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:21,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-07-09 18:22:21,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:22:21,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:21,645 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, 1, 1, 1, 1] [2021-07-09 18:22:21,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 18:22:21,645 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:21,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:21,645 INFO L82 PathProgramCache]: Analyzing trace with hash -647935628, now seen corresponding path program 2 times [2021-07-09 18:22:21,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:21,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874752292] [2021-07-09 18:22:21,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:21,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:21,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874752292] [2021-07-09 18:22:21,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874752292] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:21,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:21,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:22:21,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102571925] [2021-07-09 18:22:21,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:21,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:21,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:21,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:21,683 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:21,743 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-07-09 18:22:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:22:21,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 18:22:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:21,750 INFO L225 Difference]: With dead ends: 1308 [2021-07-09 18:22:21,750 INFO L226 Difference]: Without dead ends: 1308 [2021-07-09 18:22:21,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:21,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-07-09 18:22:21,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-07-09 18:22:21,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-07-09 18:22:21,780 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-07-09 18:22:21,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:21,780 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-07-09 18:22:21,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:21,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-07-09 18:22:21,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:22:21,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:21,783 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, 1, 1, 1, 1] [2021-07-09 18:22:21,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 18:22:21,784 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:21,784 INFO L82 PathProgramCache]: Analyzing trace with hash 373109395, now seen corresponding path program 2 times [2021-07-09 18:22:21,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:21,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900048453] [2021-07-09 18:22:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:21,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:21,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900048453] [2021-07-09 18:22:21,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900048453] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:21,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:21,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:22:21,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058064233] [2021-07-09 18:22:21,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:21,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:21,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:21,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:21,841 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:21,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:21,881 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-07-09 18:22:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:22:21,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 18:22:21,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:21,895 INFO L225 Difference]: With dead ends: 1142 [2021-07-09 18:22:21,895 INFO L226 Difference]: Without dead ends: 1120 [2021-07-09 18:22:21,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:21,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-07-09 18:22:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-07-09 18:22:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-07-09 18:22:21,922 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-07-09 18:22:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:21,922 INFO L482 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-07-09 18:22:21,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-07-09 18:22:21,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:22:21,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:21,925 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, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:21,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 18:22:21,926 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:21,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:21,926 INFO L82 PathProgramCache]: Analyzing trace with hash -236313260, now seen corresponding path program 1 times [2021-07-09 18:22:21,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:21,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837713415] [2021-07-09 18:22:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:22:21,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:21,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837713415] [2021-07-09 18:22:21,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837713415] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:21,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:21,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:22:21,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918241283] [2021-07-09 18:22:21,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:21,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:21,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:21,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:21,964 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 18:22:21,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:21,981 INFO L93 Difference]: Finished difference Result 1334 states and 4929 transitions. [2021-07-09 18:22:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:22:21,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2021-07-09 18:22:21,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:21,989 INFO L225 Difference]: With dead ends: 1334 [2021-07-09 18:22:21,989 INFO L226 Difference]: Without dead ends: 1334 [2021-07-09 18:22:21,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:22:21,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-07-09 18:22:22,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 954. [2021-07-09 18:22:22,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.63903462749213) internal successors, (3468), 953 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:22,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3468 transitions. [2021-07-09 18:22:22,015 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3468 transitions. Word has length 27 [2021-07-09 18:22:22,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:22,016 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3468 transitions. [2021-07-09 18:22:22,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 18:22:22,017 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3468 transitions. [2021-07-09 18:22:22,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:22:22,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:22,021 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, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:22,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 18:22:22,021 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:22,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:22,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2123280916, now seen corresponding path program 1 times [2021-07-09 18:22:22,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:22,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451084988] [2021-07-09 18:22:22,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:22,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:22,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:22,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451084988] [2021-07-09 18:22:22,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451084988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:22,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946976643] [2021-07-09 18:22:22,060 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 18:22:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:22,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 18:22:22,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:22,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946976643] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:22,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:22:22,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-07-09 18:22:22,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648108467] [2021-07-09 18:22:22,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:22,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:22,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:22,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:22,165 INFO L87 Difference]: Start difference. First operand 954 states and 3468 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 18:22:22,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:22,183 INFO L93 Difference]: Finished difference Result 1658 states and 5999 transitions. [2021-07-09 18:22:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:22:22,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2021-07-09 18:22:22,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:22,202 INFO L225 Difference]: With dead ends: 1658 [2021-07-09 18:22:22,202 INFO L226 Difference]: Without dead ends: 1658 [2021-07-09 18:22:22,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:22,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-07-09 18:22:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1112. [2021-07-09 18:22:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.667866786678668) internal successors, (4075), 1111 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:22,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4075 transitions. [2021-07-09 18:22:22,237 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4075 transitions. Word has length 27 [2021-07-09 18:22:22,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:22,237 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 4075 transitions. [2021-07-09 18:22:22,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 18:22:22,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4075 transitions. [2021-07-09 18:22:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:22:22,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:22,239 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:22,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:22,459 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:22,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:22,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1655387498, now seen corresponding path program 1 times [2021-07-09 18:22:22,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:22,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913962359] [2021-07-09 18:22:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:22,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:22,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913962359] [2021-07-09 18:22:22,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913962359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:22,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348027036] [2021-07-09 18:22:22,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:22:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:22,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:22:22,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:22,740 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 17 treesize of output 13 [2021-07-09 18:22:22,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:22,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:22,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:22,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-09 18:22:22,782 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 15 treesize of output 11 [2021-07-09 18:22:22,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:22,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:22,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:22,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-07-09 18:22:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:22,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348027036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:22,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:22,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:22:22,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101775105] [2021-07-09 18:22:22,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:22:22,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:22,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:22:22,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:22:22,834 INFO L87 Difference]: Start difference. First operand 1112 states and 4075 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 18:22:23,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:23,062 INFO L93 Difference]: Finished difference Result 2437 states and 9137 transitions. [2021-07-09 18:22:23,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:22:23,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 29 [2021-07-09 18:22:23,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:23,069 INFO L225 Difference]: With dead ends: 2437 [2021-07-09 18:22:23,070 INFO L226 Difference]: Without dead ends: 2358 [2021-07-09 18:22:23,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:22:23,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-07-09 18:22:23,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1653. [2021-07-09 18:22:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.7421307506053267) internal successors, (6182), 1652 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 6182 transitions. [2021-07-09 18:22:23,105 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 6182 transitions. Word has length 29 [2021-07-09 18:22:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:23,105 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 6182 transitions. [2021-07-09 18:22:23,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 18:22:23,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 6182 transitions. [2021-07-09 18:22:23,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:22:23,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:23,109 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:23,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 18:22:23,324 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:23,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:23,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1973616880, now seen corresponding path program 2 times [2021-07-09 18:22:23,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:23,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817467993] [2021-07-09 18:22:23,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:23,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:23,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817467993] [2021-07-09 18:22:23,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817467993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:23,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37104913] [2021-07-09 18:22:23,443 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 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 18:22:23,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:22:23,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:23,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:22:23,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:23,529 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 17 treesize of output 13 [2021-07-09 18:22:23,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:23,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:23,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:23,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-09 18:22:23,561 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 15 treesize of output 11 [2021-07-09 18:22:23,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:23,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:23,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:23,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-07-09 18:22:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:23,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37104913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:23,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:23,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:22:23,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105084401] [2021-07-09 18:22:23,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:22:23,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:23,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:22:23,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:22:23,600 INFO L87 Difference]: Start difference. First operand 1653 states and 6182 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 18:22:23,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:23,762 INFO L93 Difference]: Finished difference Result 2489 states and 9353 transitions. [2021-07-09 18:22:23,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:22:23,763 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 29 [2021-07-09 18:22:23,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:23,770 INFO L225 Difference]: With dead ends: 2489 [2021-07-09 18:22:23,770 INFO L226 Difference]: Without dead ends: 2410 [2021-07-09 18:22:23,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:22:23,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-07-09 18:22:23,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1791. [2021-07-09 18:22:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.7452513966480447) internal successors, (6704), 1790 states have internal predecessors, (6704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:23,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6704 transitions. [2021-07-09 18:22:23,853 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6704 transitions. Word has length 29 [2021-07-09 18:22:23,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:23,855 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6704 transitions. [2021-07-09 18:22:23,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 18:22:23,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6704 transitions. [2021-07-09 18:22:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:22:23,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:23,860 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:24,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:24,082 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:24,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:24,084 INFO L82 PathProgramCache]: Analyzing trace with hash -2042339794, now seen corresponding path program 3 times [2021-07-09 18:22:24,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:24,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472373836] [2021-07-09 18:22:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:24,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:24,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472373836] [2021-07-09 18:22:24,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472373836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:24,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399244628] [2021-07-09 18:22:24,208 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 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 18:22:24,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:22:24,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:24,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:22:24,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:24,309 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 13 treesize of output 9 [2021-07-09 18:22:24,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:24,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:24,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:24,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-07-09 18:22:24,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 18:22:24,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:24,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:24,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:24,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-07-09 18:22:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:24,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399244628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:24,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:24,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:22:24,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888382008] [2021-07-09 18:22:24,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:22:24,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:24,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:22:24,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:22:24,392 INFO L87 Difference]: Start difference. First operand 1791 states and 6704 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 18:22:24,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:24,576 INFO L93 Difference]: Finished difference Result 3013 states and 11337 transitions. [2021-07-09 18:22:24,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:22:24,577 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 29 [2021-07-09 18:22:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:24,588 INFO L225 Difference]: With dead ends: 3013 [2021-07-09 18:22:24,588 INFO L226 Difference]: Without dead ends: 2934 [2021-07-09 18:22:24,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 154.0ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:22:24,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-07-09 18:22:24,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 1887. [2021-07-09 18:22:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 3.7338282078472957) internal successors, (7042), 1886 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 7042 transitions. [2021-07-09 18:22:24,643 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 7042 transitions. Word has length 29 [2021-07-09 18:22:24,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:24,644 INFO L482 AbstractCegarLoop]: Abstraction has 1887 states and 7042 transitions. [2021-07-09 18:22:24,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 18:22:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 7042 transitions. [2021-07-09 18:22:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:22:24,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:24,650 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:24,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-09 18:22:24,874 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:24,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:24,874 INFO L82 PathProgramCache]: Analyzing trace with hash 582053582, now seen corresponding path program 4 times [2021-07-09 18:22:24,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:24,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489347791] [2021-07-09 18:22:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:24,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:24,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489347791] [2021-07-09 18:22:24,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489347791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:24,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937933055] [2021-07-09 18:22:24,991 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 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 18:22:25,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:22:25,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:25,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:22:25,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:25,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-09 18:22:25,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:25,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:25,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:25,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-09 18:22:25,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 18:22:25,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:25,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:25,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:25,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-07-09 18:22:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:25,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937933055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:25,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:25,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:22:25,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241709401] [2021-07-09 18:22:25,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:22:25,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:25,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:22:25,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:22:25,156 INFO L87 Difference]: Start difference. First operand 1887 states and 7042 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 18:22:25,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:25,406 INFO L93 Difference]: Finished difference Result 3013 states and 11358 transitions. [2021-07-09 18:22:25,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:22:25,406 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 29 [2021-07-09 18:22:25,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:25,416 INFO L225 Difference]: With dead ends: 3013 [2021-07-09 18:22:25,416 INFO L226 Difference]: Without dead ends: 2934 [2021-07-09 18:22:25,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:22:25,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-07-09 18:22:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2081. [2021-07-09 18:22:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 3.751923076923077) internal successors, (7804), 2080 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7804 transitions. [2021-07-09 18:22:25,468 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7804 transitions. Word has length 29 [2021-07-09 18:22:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:25,468 INFO L482 AbstractCegarLoop]: Abstraction has 2081 states and 7804 transitions. [2021-07-09 18:22:25,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 18:22:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7804 transitions. [2021-07-09 18:22:25,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:22:25,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:25,473 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:25,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:25,693 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash -83909336, now seen corresponding path program 5 times [2021-07-09 18:22:25,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:25,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831024722] [2021-07-09 18:22:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:25,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:25,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831024722] [2021-07-09 18:22:25,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831024722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:25,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452639299] [2021-07-09 18:22:25,803 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 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 18:22:25,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:22:25,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:25,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:22:25,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:25,909 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 17 treesize of output 13 [2021-07-09 18:22:25,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:25,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:25,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:25,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-09 18:22:25,952 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 15 treesize of output 11 [2021-07-09 18:22:25,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:25,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:25,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:25,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-07-09 18:22:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:25,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452639299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:25,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:25,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:22:25,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096735884] [2021-07-09 18:22:25,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:22:25,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:25,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:22:25,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:22:25,992 INFO L87 Difference]: Start difference. First operand 2081 states and 7804 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 18:22:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:26,201 INFO L93 Difference]: Finished difference Result 2791 states and 10482 transitions. [2021-07-09 18:22:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:22:26,201 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 29 [2021-07-09 18:22:26,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:26,209 INFO L225 Difference]: With dead ends: 2791 [2021-07-09 18:22:26,209 INFO L226 Difference]: Without dead ends: 2712 [2021-07-09 18:22:26,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:22:26,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-07-09 18:22:26,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 1882. [2021-07-09 18:22:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.741095162147794) internal successors, (7037), 1881 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 7037 transitions. [2021-07-09 18:22:26,246 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 7037 transitions. Word has length 29 [2021-07-09 18:22:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:26,247 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 7037 transitions. [2021-07-09 18:22:26,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 18:22:26,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 7037 transitions. [2021-07-09 18:22:26,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:22:26,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:26,250 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:26,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 18:22:26,475 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:26,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:26,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2053161624, now seen corresponding path program 6 times [2021-07-09 18:22:26,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:26,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810463235] [2021-07-09 18:22:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:26,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:26,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810463235] [2021-07-09 18:22:26,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810463235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:26,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799633852] [2021-07-09 18:22:26,601 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 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 18:22:26,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:22:26,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:26,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:22:26,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:26,692 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 15 treesize of output 11 [2021-07-09 18:22:26,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:26,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:26,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:26,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-07-09 18:22:26,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 18:22:26,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:26,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:26,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:26,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-07-09 18:22:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:26,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799633852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:26,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:26,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-07-09 18:22:26,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067589743] [2021-07-09 18:22:26,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:22:26,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:26,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:22:26,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:22:26,790 INFO L87 Difference]: Start difference. First operand 1882 states and 7037 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 18:22:27,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:27,031 INFO L93 Difference]: Finished difference Result 2687 states and 10043 transitions. [2021-07-09 18:22:27,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:22:27,031 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 29 [2021-07-09 18:22:27,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:27,038 INFO L225 Difference]: With dead ends: 2687 [2021-07-09 18:22:27,038 INFO L226 Difference]: Without dead ends: 2608 [2021-07-09 18:22:27,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:22:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-07-09 18:22:27,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1926. [2021-07-09 18:22:27,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.7314285714285713) internal successors, (7183), 1925 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 7183 transitions. [2021-07-09 18:22:27,072 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 7183 transitions. Word has length 29 [2021-07-09 18:22:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:27,072 INFO L482 AbstractCegarLoop]: Abstraction has 1926 states and 7183 transitions. [2021-07-09 18:22:27,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 18:22:27,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 7183 transitions. [2021-07-09 18:22:27,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:22:27,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:27,076 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:27,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:22:27,292 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:27,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:27,292 INFO L82 PathProgramCache]: Analyzing trace with hash 586599064, now seen corresponding path program 7 times [2021-07-09 18:22:27,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:27,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99254858] [2021-07-09 18:22:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:27,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:27,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99254858] [2021-07-09 18:22:27,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99254858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:27,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248289097] [2021-07-09 18:22:27,319 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 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 18:22:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:27,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:22:27,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:27,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248289097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:27,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:27,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-07-09 18:22:27,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705191679] [2021-07-09 18:22:27,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:22:27,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:27,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:22:27,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:22:27,421 INFO L87 Difference]: Start difference. First operand 1926 states and 7183 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 18:22:27,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:27,492 INFO L93 Difference]: Finished difference Result 3472 states and 12599 transitions. [2021-07-09 18:22:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:22:27,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 31 [2021-07-09 18:22:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:27,501 INFO L225 Difference]: With dead ends: 3472 [2021-07-09 18:22:27,502 INFO L226 Difference]: Without dead ends: 3318 [2021-07-09 18:22:27,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:22:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2021-07-09 18:22:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2796. [2021-07-09 18:22:27,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 3.759212880143113) internal successors, (10507), 2795 states have internal predecessors, (10507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 10507 transitions. [2021-07-09 18:22:27,553 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 10507 transitions. Word has length 31 [2021-07-09 18:22:27,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:27,553 INFO L482 AbstractCegarLoop]: Abstraction has 2796 states and 10507 transitions. [2021-07-09 18:22:27,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 18:22:27,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 10507 transitions. [2021-07-09 18:22:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:22:27,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:27,558 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:27,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 18:22:27,775 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:27,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:27,775 INFO L82 PathProgramCache]: Analyzing trace with hash 413869912, now seen corresponding path program 8 times [2021-07-09 18:22:27,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:27,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283098424] [2021-07-09 18:22:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:22:27,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:27,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283098424] [2021-07-09 18:22:27,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283098424] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:27,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:22:27,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:22:27,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74103189] [2021-07-09 18:22:27,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:22:27,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:27,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:22:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:27,795 INFO L87 Difference]: Start difference. First operand 2796 states and 10507 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:27,833 INFO L93 Difference]: Finished difference Result 5761 states and 21881 transitions. [2021-07-09 18:22:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:22:27,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:22:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:27,845 INFO L225 Difference]: With dead ends: 5761 [2021-07-09 18:22:27,845 INFO L226 Difference]: Without dead ends: 5510 [2021-07-09 18:22:27,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2021-07-09 18:22:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 4894. [2021-07-09 18:22:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4894 states, 4893 states have (on average 3.8779889638258735) internal successors, (18975), 4893 states have internal predecessors, (18975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4894 states to 4894 states and 18975 transitions. [2021-07-09 18:22:27,971 INFO L78 Accepts]: Start accepts. Automaton has 4894 states and 18975 transitions. Word has length 31 [2021-07-09 18:22:27,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:27,971 INFO L482 AbstractCegarLoop]: Abstraction has 4894 states and 18975 transitions. [2021-07-09 18:22:27,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,971 INFO L276 IsEmpty]: Start isEmpty. Operand 4894 states and 18975 transitions. [2021-07-09 18:22:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:22:27,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:27,981 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:27,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-07-09 18:22:27,981 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:27,981 INFO L82 PathProgramCache]: Analyzing trace with hash -973577864, now seen corresponding path program 9 times [2021-07-09 18:22:27,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:27,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696476465] [2021-07-09 18:22:27,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:22:28,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:28,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696476465] [2021-07-09 18:22:28,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696476465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:28,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535700554] [2021-07-09 18:22:28,003 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 18:22:28,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:22:28,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:28,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:22:28,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:22:28,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535700554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:28,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:28,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 18:22:28,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503941580] [2021-07-09 18:22:28,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:22:28,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:28,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:22:28,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:22:28,125 INFO L87 Difference]: Start difference. First operand 4894 states and 18975 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:28,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:28,406 INFO L93 Difference]: Finished difference Result 17927 states and 66398 transitions. [2021-07-09 18:22:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:22:28,406 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:22:28,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:28,451 INFO L225 Difference]: With dead ends: 17927 [2021-07-09 18:22:28,451 INFO L226 Difference]: Without dead ends: 15301 [2021-07-09 18:22:28,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:22:28,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2021-07-09 18:22:28,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 8354. [2021-07-09 18:22:28,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8354 states, 8353 states have (on average 3.950676403687298) internal successors, (33000), 8353 states have internal predecessors, (33000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8354 states to 8354 states and 33000 transitions. [2021-07-09 18:22:28,863 INFO L78 Accepts]: Start accepts. Automaton has 8354 states and 33000 transitions. Word has length 34 [2021-07-09 18:22:28,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:28,863 INFO L482 AbstractCegarLoop]: Abstraction has 8354 states and 33000 transitions. [2021-07-09 18:22:28,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 8354 states and 33000 transitions. [2021-07-09 18:22:28,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:22:28,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:28,883 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:29,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:22:29,102 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:29,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:29,103 INFO L82 PathProgramCache]: Analyzing trace with hash 726243605, now seen corresponding path program 10 times [2021-07-09 18:22:29,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:29,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018417500] [2021-07-09 18:22:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:22:29,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:29,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018417500] [2021-07-09 18:22:29,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018417500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:29,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034057935] [2021-07-09 18:22:29,126 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 18:22:29,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:22:29,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:29,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:22:29,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:22:29,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034057935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:29,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:29,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 18:22:29,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916031727] [2021-07-09 18:22:29,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:22:29,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:29,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:22:29,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:22:29,250 INFO L87 Difference]: Start difference. First operand 8354 states and 33000 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:29,743 INFO L93 Difference]: Finished difference Result 21371 states and 81454 transitions. [2021-07-09 18:22:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:22:29,743 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:22:29,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:29,799 INFO L225 Difference]: With dead ends: 21371 [2021-07-09 18:22:29,800 INFO L226 Difference]: Without dead ends: 20932 [2021-07-09 18:22:29,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:22:29,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20932 states. [2021-07-09 18:22:30,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20932 to 12631. [2021-07-09 18:22:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12631 states, 12630 states have (on average 4.037925574030087) internal successors, (50999), 12630 states have internal predecessors, (50999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12631 states to 12631 states and 50999 transitions. [2021-07-09 18:22:30,649 INFO L78 Accepts]: Start accepts. Automaton has 12631 states and 50999 transitions. Word has length 34 [2021-07-09 18:22:30,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:30,649 INFO L482 AbstractCegarLoop]: Abstraction has 12631 states and 50999 transitions. [2021-07-09 18:22:30,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:30,649 INFO L276 IsEmpty]: Start isEmpty. Operand 12631 states and 50999 transitions. [2021-07-09 18:22:30,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:22:30,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:30,681 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:30,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:30,898 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:30,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:30,899 INFO L82 PathProgramCache]: Analyzing trace with hash 493451422, now seen corresponding path program 11 times [2021-07-09 18:22:30,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:30,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28349384] [2021-07-09 18:22:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:30,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:30,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28349384] [2021-07-09 18:22:30,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28349384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:30,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817442842] [2021-07-09 18:22:30,928 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 18:22:31,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:22:31,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:31,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:22:31,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:31,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817442842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:31,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:31,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-09 18:22:31,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397341104] [2021-07-09 18:22:31,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:22:31,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:31,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:22:31,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:22:31,123 INFO L87 Difference]: Start difference. First operand 12631 states and 50999 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:31,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:31,464 INFO L93 Difference]: Finished difference Result 20596 states and 79596 transitions. [2021-07-09 18:22:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:22:31,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:22:31,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:31,524 INFO L225 Difference]: With dead ends: 20596 [2021-07-09 18:22:31,525 INFO L226 Difference]: Without dead ends: 20518 [2021-07-09 18:22:31,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:22:31,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20518 states. [2021-07-09 18:22:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20518 to 12577. [2021-07-09 18:22:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12577 states, 12576 states have (on average 4.042064249363868) internal successors, (50833), 12576 states have internal predecessors, (50833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12577 states to 12577 states and 50833 transitions. [2021-07-09 18:22:31,944 INFO L78 Accepts]: Start accepts. Automaton has 12577 states and 50833 transitions. Word has length 34 [2021-07-09 18:22:31,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:31,944 INFO L482 AbstractCegarLoop]: Abstraction has 12577 states and 50833 transitions. [2021-07-09 18:22:31,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:31,944 INFO L276 IsEmpty]: Start isEmpty. Operand 12577 states and 50833 transitions. [2021-07-09 18:22:31,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:22:31,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:31,972 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:32,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:32,188 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:32,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:32,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1356082631, now seen corresponding path program 12 times [2021-07-09 18:22:32,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:32,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950482930] [2021-07-09 18:22:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:32,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:32,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950482930] [2021-07-09 18:22:32,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950482930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:32,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498643923] [2021-07-09 18:22:32,225 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 18:22:32,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:22:32,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:32,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:22:32,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:32,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498643923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:32,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:32,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-09 18:22:32,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732190435] [2021-07-09 18:22:32,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:22:32,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:32,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:22:32,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:22:32,372 INFO L87 Difference]: Start difference. First operand 12577 states and 50833 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:32,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:32,845 INFO L93 Difference]: Finished difference Result 22733 states and 87606 transitions. [2021-07-09 18:22:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:22:32,846 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:22:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:32,915 INFO L225 Difference]: With dead ends: 22733 [2021-07-09 18:22:32,915 INFO L226 Difference]: Without dead ends: 21028 [2021-07-09 18:22:32,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:22:32,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21028 states. [2021-07-09 18:22:33,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21028 to 15386. [2021-07-09 18:22:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15386 states, 15385 states have (on average 4.0534936626584335) internal successors, (62363), 15385 states have internal predecessors, (62363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:33,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15386 states to 15386 states and 62363 transitions. [2021-07-09 18:22:33,466 INFO L78 Accepts]: Start accepts. Automaton has 15386 states and 62363 transitions. Word has length 34 [2021-07-09 18:22:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:33,466 INFO L482 AbstractCegarLoop]: Abstraction has 15386 states and 62363 transitions. [2021-07-09 18:22:33,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:33,466 INFO L276 IsEmpty]: Start isEmpty. Operand 15386 states and 62363 transitions. [2021-07-09 18:22:33,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:22:33,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:33,508 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:33,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 18:22:33,711 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:33,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:33,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1422790198, now seen corresponding path program 13 times [2021-07-09 18:22:33,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:33,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323659702] [2021-07-09 18:22:33,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:33,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:33,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323659702] [2021-07-09 18:22:33,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323659702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:33,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824840347] [2021-07-09 18:22:33,786 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 18:22:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:33,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:22:33,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:33,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824840347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:33,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:33,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 18:22:33,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935539129] [2021-07-09 18:22:33,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:22:33,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:33,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:22:33,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:22:33,883 INFO L87 Difference]: Start difference. First operand 15386 states and 62363 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:34,367 INFO L93 Difference]: Finished difference Result 31402 states and 124083 transitions. [2021-07-09 18:22:34,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:22:34,367 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:22:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:34,460 INFO L225 Difference]: With dead ends: 31402 [2021-07-09 18:22:34,460 INFO L226 Difference]: Without dead ends: 31094 [2021-07-09 18:22:34,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:22:34,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31094 states. [2021-07-09 18:22:35,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31094 to 19812. [2021-07-09 18:22:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19812 states, 19811 states have (on average 4.119024784210792) internal successors, (81602), 19811 states have internal predecessors, (81602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19812 states to 19812 states and 81602 transitions. [2021-07-09 18:22:35,187 INFO L78 Accepts]: Start accepts. Automaton has 19812 states and 81602 transitions. Word has length 34 [2021-07-09 18:22:35,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:35,187 INFO L482 AbstractCegarLoop]: Abstraction has 19812 states and 81602 transitions. [2021-07-09 18:22:35,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:35,187 INFO L276 IsEmpty]: Start isEmpty. Operand 19812 states and 81602 transitions. [2021-07-09 18:22:35,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:22:35,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:35,228 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:35,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:35,442 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:35,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:35,443 INFO L82 PathProgramCache]: Analyzing trace with hash 959184970, now seen corresponding path program 14 times [2021-07-09 18:22:35,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:35,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697032454] [2021-07-09 18:22:35,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:22:35,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:35,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697032454] [2021-07-09 18:22:35,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697032454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:35,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876838327] [2021-07-09 18:22:35,497 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 18:22:35,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:22:35,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:35,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:22:35,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:35,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:35,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876838327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:35,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:35,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-09 18:22:35,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319066622] [2021-07-09 18:22:35,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:22:35,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:35,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:22:35,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:22:35,631 INFO L87 Difference]: Start difference. First operand 19812 states and 81602 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:36,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:36,122 INFO L93 Difference]: Finished difference Result 33709 states and 133959 transitions. [2021-07-09 18:22:36,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:22:36,122 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:22:36,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:36,223 INFO L225 Difference]: With dead ends: 33709 [2021-07-09 18:22:36,224 INFO L226 Difference]: Without dead ends: 32656 [2021-07-09 18:22:36,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:22:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32656 states. [2021-07-09 18:22:36,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32656 to 23355. [2021-07-09 18:22:36,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23355 states, 23354 states have (on average 4.114370129314036) internal successors, (96087), 23354 states have internal predecessors, (96087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:37,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23355 states to 23355 states and 96087 transitions. [2021-07-09 18:22:37,060 INFO L78 Accepts]: Start accepts. Automaton has 23355 states and 96087 transitions. Word has length 34 [2021-07-09 18:22:37,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:37,061 INFO L482 AbstractCegarLoop]: Abstraction has 23355 states and 96087 transitions. [2021-07-09 18:22:37,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:37,061 INFO L276 IsEmpty]: Start isEmpty. Operand 23355 states and 96087 transitions. [2021-07-09 18:22:37,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:22:37,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:37,117 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:37,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:22:37,333 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:37,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:37,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1446275945, now seen corresponding path program 15 times [2021-07-09 18:22:37,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:37,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845203438] [2021-07-09 18:22:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:22:37,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:37,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845203438] [2021-07-09 18:22:37,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845203438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:37,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716790411] [2021-07-09 18:22:37,350 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 18:22:37,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:22:37,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:37,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:22:37,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:22:37,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716790411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:37,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:37,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-09 18:22:37,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044688498] [2021-07-09 18:22:37,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:22:37,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:37,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:22:37,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:22:37,491 INFO L87 Difference]: Start difference. First operand 23355 states and 96087 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:37,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:37,999 INFO L93 Difference]: Finished difference Result 31214 states and 125510 transitions. [2021-07-09 18:22:37,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:22:37,999 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:22:37,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:38,104 INFO L225 Difference]: With dead ends: 31214 [2021-07-09 18:22:38,104 INFO L226 Difference]: Without dead ends: 31106 [2021-07-09 18:22:38,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:22:38,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31106 states. [2021-07-09 18:22:38,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31106 to 24543. [2021-07-09 18:22:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24543 states, 24542 states have (on average 4.135033819574606) internal successors, (101482), 24542 states have internal predecessors, (101482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24543 states to 24543 states and 101482 transitions. [2021-07-09 18:22:39,113 INFO L78 Accepts]: Start accepts. Automaton has 24543 states and 101482 transitions. Word has length 34 [2021-07-09 18:22:39,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:39,113 INFO L482 AbstractCegarLoop]: Abstraction has 24543 states and 101482 transitions. [2021-07-09 18:22:39,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 24543 states and 101482 transitions. [2021-07-09 18:22:39,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:22:39,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:39,165 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:39,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:39,381 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:39,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:39,381 INFO L82 PathProgramCache]: Analyzing trace with hash 351777995, now seen corresponding path program 16 times [2021-07-09 18:22:39,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:39,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121545588] [2021-07-09 18:22:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-09 18:22:39,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:39,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121545588] [2021-07-09 18:22:39,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121545588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:39,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590990469] [2021-07-09 18:22:39,399 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 18:22:39,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:22:39,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:39,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:22:39,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-09 18:22:39,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590990469] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:39,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:22:39,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-07-09 18:22:39,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334191091] [2021-07-09 18:22:39,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:22:39,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:39,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:22:39,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:39,474 INFO L87 Difference]: Start difference. First operand 24543 states and 101482 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 18:22:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:39,858 INFO L93 Difference]: Finished difference Result 29524 states and 121533 transitions. [2021-07-09 18:22:39,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:22:39,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 37 [2021-07-09 18:22:39,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:40,009 INFO L225 Difference]: With dead ends: 29524 [2021-07-09 18:22:40,010 INFO L226 Difference]: Without dead ends: 29524 [2021-07-09 18:22:40,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:22:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29524 states. [2021-07-09 18:22:40,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29524 to 22120. [2021-07-09 18:22:40,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22120 states, 22119 states have (on average 4.096252090962521) internal successors, (90605), 22119 states have internal predecessors, (90605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22120 states to 22120 states and 90605 transitions. [2021-07-09 18:22:40,749 INFO L78 Accepts]: Start accepts. Automaton has 22120 states and 90605 transitions. Word has length 37 [2021-07-09 18:22:40,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:40,749 INFO L482 AbstractCegarLoop]: Abstraction has 22120 states and 90605 transitions. [2021-07-09 18:22:40,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 18:22:40,749 INFO L276 IsEmpty]: Start isEmpty. Operand 22120 states and 90605 transitions. [2021-07-09 18:22:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:22:40,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:40,795 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:41,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 18:22:41,010 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:41,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:41,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2034805493, now seen corresponding path program 17 times [2021-07-09 18:22:41,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:41,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524727736] [2021-07-09 18:22:41,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 18:22:41,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:41,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524727736] [2021-07-09 18:22:41,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524727736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:41,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066855240] [2021-07-09 18:22:41,030 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 18:22:41,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:22:41,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:41,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:22:41,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 18:22:41,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066855240] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:22:41,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:22:41,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-07-09 18:22:41,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564728929] [2021-07-09 18:22:41,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:22:41,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:41,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:22:41,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:22:41,143 INFO L87 Difference]: Start difference. First operand 22120 states and 90605 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:41,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:41,572 INFO L93 Difference]: Finished difference Result 30000 states and 123549 transitions. [2021-07-09 18:22:41,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:22:41,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:22:41,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:41,671 INFO L225 Difference]: With dead ends: 30000 [2021-07-09 18:22:41,672 INFO L226 Difference]: Without dead ends: 30000 [2021-07-09 18:22:41,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:22:41,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30000 states. [2021-07-09 18:22:42,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30000 to 24376. [2021-07-09 18:22:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24376 states, 24375 states have (on average 4.091979487179487) internal successors, (99742), 24375 states have internal predecessors, (99742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24376 states to 24376 states and 99742 transitions. [2021-07-09 18:22:42,433 INFO L78 Accepts]: Start accepts. Automaton has 24376 states and 99742 transitions. Word has length 37 [2021-07-09 18:22:42,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:42,433 INFO L482 AbstractCegarLoop]: Abstraction has 24376 states and 99742 transitions. [2021-07-09 18:22:42,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 24376 states and 99742 transitions. [2021-07-09 18:22:42,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:22:42,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:42,487 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:42,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 18:22:42,701 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:42,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:42,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1631458869, now seen corresponding path program 18 times [2021-07-09 18:22:42,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:42,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282950106] [2021-07-09 18:22:42,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:22:42,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:42,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282950106] [2021-07-09 18:22:42,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282950106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:42,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405006691] [2021-07-09 18:22:42,718 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 18:22:42,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:22:42,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:42,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:22:42,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:42,985 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-09 18:22:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:22:43,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405006691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:43,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:43,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 18:22:43,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173915821] [2021-07-09 18:22:43,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:22:43,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:43,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:22:43,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:22:43,012 INFO L87 Difference]: Start difference. First operand 24376 states and 99742 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 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 18:22:43,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:43,278 INFO L93 Difference]: Finished difference Result 37294 states and 154370 transitions. [2021-07-09 18:22:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:22:43,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 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 37 [2021-07-09 18:22:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:43,425 INFO L225 Difference]: With dead ends: 37294 [2021-07-09 18:22:43,425 INFO L226 Difference]: Without dead ends: 37294 [2021-07-09 18:22:43,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:22:43,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37294 states. [2021-07-09 18:22:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37294 to 34517. [2021-07-09 18:22:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34517 states, 34516 states have (on average 4.136226677482907) internal successors, (142766), 34516 states have internal predecessors, (142766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34517 states to 34517 states and 142766 transitions. [2021-07-09 18:22:44,515 INFO L78 Accepts]: Start accepts. Automaton has 34517 states and 142766 transitions. Word has length 37 [2021-07-09 18:22:44,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:44,515 INFO L482 AbstractCegarLoop]: Abstraction has 34517 states and 142766 transitions. [2021-07-09 18:22:44,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 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 18:22:44,515 INFO L276 IsEmpty]: Start isEmpty. Operand 34517 states and 142766 transitions. [2021-07-09 18:22:44,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:22:44,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:44,598 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:44,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 18:22:44,814 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:44,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:44,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1763377011, now seen corresponding path program 19 times [2021-07-09 18:22:44,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:44,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804205687] [2021-07-09 18:22:44,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:45,214 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 18:22:45,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:45,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804205687] [2021-07-09 18:22:45,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804205687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:45,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319132712] [2021-07-09 18:22:45,215 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 18:22:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:45,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:22:45,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:45,760 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:22:45,761 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:22:45,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:45,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:45,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:45,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:22:45,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:22:45,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:45,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:45,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:45,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:22:45,927 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 18:22:45,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319132712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:45,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:45,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:22:45,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126880346] [2021-07-09 18:22:45,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:22:45,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:45,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:22:45,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:22:45,928 INFO L87 Difference]: Start difference. First operand 34517 states and 142766 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:47,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:47,786 INFO L93 Difference]: Finished difference Result 61929 states and 253070 transitions. [2021-07-09 18:22:47,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:22:47,786 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:22:47,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:48,300 INFO L225 Difference]: With dead ends: 61929 [2021-07-09 18:22:48,300 INFO L226 Difference]: Without dead ends: 61737 [2021-07-09 18:22:48,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1116.6ms TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:22:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61737 states. [2021-07-09 18:22:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61737 to 34859. [2021-07-09 18:22:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34859 states, 34858 states have (on average 4.136668770440071) internal successors, (144196), 34858 states have internal predecessors, (144196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:49,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34859 states to 34859 states and 144196 transitions. [2021-07-09 18:22:49,898 INFO L78 Accepts]: Start accepts. Automaton has 34859 states and 144196 transitions. Word has length 39 [2021-07-09 18:22:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:49,898 INFO L482 AbstractCegarLoop]: Abstraction has 34859 states and 144196 transitions. [2021-07-09 18:22:49,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 34859 states and 144196 transitions. [2021-07-09 18:22:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:22:49,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:49,998 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:50,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 18:22:50,209 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:50,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1529459447, now seen corresponding path program 20 times [2021-07-09 18:22:50,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:50,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980138607] [2021-07-09 18:22:50,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:50,574 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 18:22:50,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:50,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980138607] [2021-07-09 18:22:50,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980138607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:50,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696652624] [2021-07-09 18:22:50,575 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 18:22:50,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:22:50,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:50,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:22:50,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:50,796 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:22:50,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:22:50,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:50,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:50,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:50,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-07-09 18:22:50,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:22:50,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:50,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:50,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:50,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:22:50,957 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 18:22:50,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696652624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:50,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:50,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:22:50,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003577637] [2021-07-09 18:22:50,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:22:50,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:50,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:22:50,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:22:50,958 INFO L87 Difference]: Start difference. First operand 34859 states and 144196 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:53,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:53,255 INFO L93 Difference]: Finished difference Result 62927 states and 257215 transitions. [2021-07-09 18:22:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:22:53,256 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:22:53,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:53,543 INFO L225 Difference]: With dead ends: 62927 [2021-07-09 18:22:53,543 INFO L226 Difference]: Without dead ends: 62711 [2021-07-09 18:22:53,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1261.0ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:22:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62711 states. [2021-07-09 18:22:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62711 to 35009. [2021-07-09 18:22:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35009 states, 35008 states have (on average 4.135283363802559) internal successors, (144768), 35008 states have internal predecessors, (144768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35009 states to 35009 states and 144768 transitions. [2021-07-09 18:22:54,974 INFO L78 Accepts]: Start accepts. Automaton has 35009 states and 144768 transitions. Word has length 39 [2021-07-09 18:22:54,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:54,974 INFO L482 AbstractCegarLoop]: Abstraction has 35009 states and 144768 transitions. [2021-07-09 18:22:54,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 35009 states and 144768 transitions. [2021-07-09 18:22:55,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:22:55,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:55,309 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:55,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 18:22:55,540 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:55,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:55,540 INFO L82 PathProgramCache]: Analyzing trace with hash -953652233, now seen corresponding path program 21 times [2021-07-09 18:22:55,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:55,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329663774] [2021-07-09 18:22:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:55,849 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 18:22:55,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:55,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329663774] [2021-07-09 18:22:55,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329663774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:55,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109239114] [2021-07-09 18:22:55,850 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 18:22:55,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:22:55,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:55,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:22:55,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:56,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:56,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:56,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-09 18:22:56,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:56,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:56,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:56,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:91 [2021-07-09 18:22:56,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-09 18:22:56,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:56,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:56,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:56,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-07-09 18:22:56,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:56,272 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:22:56,273 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:22:56,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:56,282 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 18:22:56,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:22:56,331 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 18:22:56,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109239114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:56,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:56,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:22:56,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660134974] [2021-07-09 18:22:56,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:22:56,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:56,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:22:56,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:22:56,333 INFO L87 Difference]: Start difference. First operand 35009 states and 144768 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:56,987 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-07-09 18:22:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:59,117 INFO L93 Difference]: Finished difference Result 64186 states and 261937 transitions. [2021-07-09 18:22:59,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:22:59,117 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:22:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:59,403 INFO L225 Difference]: With dead ends: 64186 [2021-07-09 18:22:59,403 INFO L226 Difference]: Without dead ends: 64076 [2021-07-09 18:22:59,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 1892.4ms TimeCoverageRelationStatistics Valid=717, Invalid=3065, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:22:59,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64076 states. [2021-07-09 18:23:00,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64076 to 35529. [2021-07-09 18:23:00,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35529 states, 35528 states have (on average 4.1301790137356456) internal successors, (146737), 35528 states have internal predecessors, (146737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35529 states to 35529 states and 146737 transitions. [2021-07-09 18:23:00,966 INFO L78 Accepts]: Start accepts. Automaton has 35529 states and 146737 transitions. Word has length 39 [2021-07-09 18:23:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:00,966 INFO L482 AbstractCegarLoop]: Abstraction has 35529 states and 146737 transitions. [2021-07-09 18:23:00,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 35529 states and 146737 transitions. [2021-07-09 18:23:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:01,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:01,357 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:01,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:01,573 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:01,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:01,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2033805687, now seen corresponding path program 22 times [2021-07-09 18:23:01,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:01,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028787185] [2021-07-09 18:23:01,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:01,906 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 18:23:01,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:01,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028787185] [2021-07-09 18:23:01,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028787185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:01,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261357388] [2021-07-09 18:23:01,906 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 18:23:01,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:23:01,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:01,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:23:01,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:02,164 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:23:02,165 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:23:02,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:02,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:02,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:02,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:23:02,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:23:02,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:02,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:02,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:02,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-09 18:23:02,329 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 18:23:02,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261357388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:02,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:02,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:23:02,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267666894] [2021-07-09 18:23:02,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:23:02,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:02,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:23:02,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:23:02,330 INFO L87 Difference]: Start difference. First operand 35529 states and 146737 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:03,163 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-07-09 18:23:04,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:04,824 INFO L93 Difference]: Finished difference Result 81268 states and 331701 transitions. [2021-07-09 18:23:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:23:04,824 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:04,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:05,254 INFO L225 Difference]: With dead ends: 81268 [2021-07-09 18:23:05,254 INFO L226 Difference]: Without dead ends: 81213 [2021-07-09 18:23:05,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1372.5ms TimeCoverageRelationStatistics Valid=338, Invalid=1642, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:23:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81213 states. [2021-07-09 18:23:06,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81213 to 35699. [2021-07-09 18:23:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35699 states, 35698 states have (on average 4.142865146506807) internal successors, (147892), 35698 states have internal predecessors, (147892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:07,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35699 states to 35699 states and 147892 transitions. [2021-07-09 18:23:07,159 INFO L78 Accepts]: Start accepts. Automaton has 35699 states and 147892 transitions. Word has length 39 [2021-07-09 18:23:07,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:07,159 INFO L482 AbstractCegarLoop]: Abstraction has 35699 states and 147892 transitions. [2021-07-09 18:23:07,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:07,159 INFO L276 IsEmpty]: Start isEmpty. Operand 35699 states and 147892 transitions. [2021-07-09 18:23:07,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:07,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:07,516 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:07,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 18:23:07,731 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:07,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:07,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1355985241, now seen corresponding path program 23 times [2021-07-09 18:23:07,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:07,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161200452] [2021-07-09 18:23:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:08,113 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 18:23:08,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:08,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161200452] [2021-07-09 18:23:08,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161200452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:08,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523296552] [2021-07-09 18:23:08,113 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 18:23:08,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:23:08,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:08,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:23:08,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:08,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:08,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-07-09 18:23:08,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:23:08,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:08,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:08,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:50 [2021-07-09 18:23:08,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:23:08,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:08,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:08,514 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 1 xjuncts. [2021-07-09 18:23:08,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:23:08,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:08,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-07-09 18:23:08,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:23:08,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:08,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:08,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 18:23:08,683 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 18:23:08,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523296552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:08,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:08,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:23:08,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305169631] [2021-07-09 18:23:08,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:23:08,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:08,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:23:08,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:23:08,684 INFO L87 Difference]: Start difference. First operand 35699 states and 147892 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:12,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:12,748 INFO L93 Difference]: Finished difference Result 67639 states and 276324 transitions. [2021-07-09 18:23:12,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:23:12,748 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:12,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:13,012 INFO L225 Difference]: With dead ends: 67639 [2021-07-09 18:23:13,012 INFO L226 Difference]: Without dead ends: 67418 [2021-07-09 18:23:13,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 2779.6ms TimeCoverageRelationStatistics Valid=710, Invalid=3982, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:23:13,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67418 states. [2021-07-09 18:23:14,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67418 to 36148. [2021-07-09 18:23:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36148 states, 36147 states have (on average 4.136857830525355) internal successors, (149535), 36147 states have internal predecessors, (149535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36148 states to 36148 states and 149535 transitions. [2021-07-09 18:23:14,497 INFO L78 Accepts]: Start accepts. Automaton has 36148 states and 149535 transitions. Word has length 39 [2021-07-09 18:23:14,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:14,497 INFO L482 AbstractCegarLoop]: Abstraction has 36148 states and 149535 transitions. [2021-07-09 18:23:14,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:14,497 INFO L276 IsEmpty]: Start isEmpty. Operand 36148 states and 149535 transitions. [2021-07-09 18:23:14,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:14,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:14,588 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:14,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:14,801 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:14,801 INFO L82 PathProgramCache]: Analyzing trace with hash -768675797, now seen corresponding path program 24 times [2021-07-09 18:23:14,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:14,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889436285] [2021-07-09 18:23:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:15,398 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 18:23:15,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:15,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889436285] [2021-07-09 18:23:15,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889436285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:15,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275702190] [2021-07-09 18:23:15,399 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 18:23:15,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:23:15,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:15,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:23:15,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:15,652 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:23:15,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:23:15,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:15,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:15,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:15,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-09 18:23:15,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:23:15,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:15,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:15,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:15,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:23:15,772 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 18:23:15,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275702190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:15,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:15,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:23:15,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614115844] [2021-07-09 18:23:15,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:23:15,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:15,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:23:15,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:23:15,774 INFO L87 Difference]: Start difference. First operand 36148 states and 149535 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:17,678 INFO L93 Difference]: Finished difference Result 77150 states and 313355 transitions. [2021-07-09 18:23:17,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:23:17,678 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:17,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:18,322 INFO L225 Difference]: With dead ends: 77150 [2021-07-09 18:23:18,323 INFO L226 Difference]: Without dead ends: 76966 [2021-07-09 18:23:18,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1368.3ms TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:23:18,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76966 states. [2021-07-09 18:23:19,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76966 to 35834. [2021-07-09 18:23:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35834 states, 35833 states have (on average 4.141601317221555) internal successors, (148406), 35833 states have internal predecessors, (148406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35834 states to 35834 states and 148406 transitions. [2021-07-09 18:23:20,016 INFO L78 Accepts]: Start accepts. Automaton has 35834 states and 148406 transitions. Word has length 39 [2021-07-09 18:23:20,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:20,017 INFO L482 AbstractCegarLoop]: Abstraction has 35834 states and 148406 transitions. [2021-07-09 18:23:20,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:20,017 INFO L276 IsEmpty]: Start isEmpty. Operand 35834 states and 148406 transitions. [2021-07-09 18:23:20,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:20,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:20,113 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:20,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 18:23:20,329 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:20,329 INFO L82 PathProgramCache]: Analyzing trace with hash -789200017, now seen corresponding path program 25 times [2021-07-09 18:23:20,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:20,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473982049] [2021-07-09 18:23:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:20,707 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 18:23:20,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:20,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473982049] [2021-07-09 18:23:20,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473982049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:20,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879295072] [2021-07-09 18:23:20,707 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 18:23:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:20,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:23:20,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:21,255 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:23:21,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:23:21,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:21,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:21,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:21,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-09 18:23:21,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:23:21,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:21,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:21,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:21,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:23:21,352 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 18:23:21,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879295072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:21,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:21,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:23:21,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012683672] [2021-07-09 18:23:21,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:23:21,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:21,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:23:21,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:23:21,353 INFO L87 Difference]: Start difference. First operand 35834 states and 148406 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:23,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:23,148 INFO L93 Difference]: Finished difference Result 64096 states and 261990 transitions. [2021-07-09 18:23:23,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:23:23,148 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:23,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:23,443 INFO L225 Difference]: With dead ends: 64096 [2021-07-09 18:23:23,443 INFO L226 Difference]: Without dead ends: 63848 [2021-07-09 18:23:23,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1433.8ms TimeCoverageRelationStatistics Valid=352, Invalid=1454, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:23:23,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63848 states. [2021-07-09 18:23:24,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63848 to 36020. [2021-07-09 18:23:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36020 states, 36019 states have (on average 4.13964851883728) internal successors, (149106), 36019 states have internal predecessors, (149106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36020 states to 36020 states and 149106 transitions. [2021-07-09 18:23:25,084 INFO L78 Accepts]: Start accepts. Automaton has 36020 states and 149106 transitions. Word has length 39 [2021-07-09 18:23:25,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:25,084 INFO L482 AbstractCegarLoop]: Abstraction has 36020 states and 149106 transitions. [2021-07-09 18:23:25,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:25,084 INFO L276 IsEmpty]: Start isEmpty. Operand 36020 states and 149106 transitions. [2021-07-09 18:23:25,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:25,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:25,186 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:25,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:25,402 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:25,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:25,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1112900731, now seen corresponding path program 26 times [2021-07-09 18:23:25,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:25,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928022363] [2021-07-09 18:23:25,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:26,022 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-07-09 18:23:26,240 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 18:23:26,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:26,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928022363] [2021-07-09 18:23:26,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928022363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:26,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377900837] [2021-07-09 18:23:26,240 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 18:23:26,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:23:26,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:26,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:23:26,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:26,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:23:26,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:26,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:26,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:26,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:23:26,552 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:23:26,552 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:23:26,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:26,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:26,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:26,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:23:26,608 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 18:23:26,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377900837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:26,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:26,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:23:26,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922193679] [2021-07-09 18:23:26,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:23:26,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:26,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:23:26,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:23:26,610 INFO L87 Difference]: Start difference. First operand 36020 states and 149106 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:27,612 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-07-09 18:23:28,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:28,963 INFO L93 Difference]: Finished difference Result 81375 states and 330962 transitions. [2021-07-09 18:23:28,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:23:28,963 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:28,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:29,468 INFO L225 Difference]: With dead ends: 81375 [2021-07-09 18:23:29,468 INFO L226 Difference]: Without dead ends: 81223 [2021-07-09 18:23:29,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1743.5ms TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:23:29,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81223 states. [2021-07-09 18:23:31,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81223 to 36090. [2021-07-09 18:23:31,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36090 states, 36089 states have (on average 4.140486020671118) internal successors, (149426), 36089 states have internal predecessors, (149426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:31,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36090 states to 36090 states and 149426 transitions. [2021-07-09 18:23:31,357 INFO L78 Accepts]: Start accepts. Automaton has 36090 states and 149426 transitions. Word has length 39 [2021-07-09 18:23:31,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:31,357 INFO L482 AbstractCegarLoop]: Abstraction has 36090 states and 149426 transitions. [2021-07-09 18:23:31,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:31,357 INFO L276 IsEmpty]: Start isEmpty. Operand 36090 states and 149426 transitions. [2021-07-09 18:23:31,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:31,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:31,439 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:31,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 18:23:31,655 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:31,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:31,655 INFO L82 PathProgramCache]: Analyzing trace with hash -908979985, now seen corresponding path program 27 times [2021-07-09 18:23:31,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:31,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32026727] [2021-07-09 18:23:31,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:32,293 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 18:23:32,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:32,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32026727] [2021-07-09 18:23:32,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32026727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:32,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089948654] [2021-07-09 18:23:32,293 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 18:23:32,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:23:32,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:32,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:23:32,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:32,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:32,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-07-09 18:23:32,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:32,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:32,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:32,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:74 [2021-07-09 18:23:32,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:32,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-07-09 18:23:32,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:32,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:32,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 38 [2021-07-09 18:23:32,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:32,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:32,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-07-09 18:23:32,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:32,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:32,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-07-09 18:23:32,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:32,778 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.4 percent of original size [2021-07-09 18:23:32,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:23:32,779 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:233, output treesize:65 [2021-07-09 18:23:32,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:32,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:23:32,860 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:32,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:32,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:32,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:23:32,908 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:32,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:32,953 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 18:23:32,953 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:88, output treesize:95 [2021-07-09 18:23:33,173 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 18:23:33,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089948654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:33,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:33,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:23:33,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011086871] [2021-07-09 18:23:33,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:23:33,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:33,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:23:33,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:23:33,174 INFO L87 Difference]: Start difference. First operand 36090 states and 149426 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:33,812 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-07-09 18:23:36,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:36,802 INFO L93 Difference]: Finished difference Result 64235 states and 260613 transitions. [2021-07-09 18:23:36,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:23:36,802 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:36,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:37,166 INFO L225 Difference]: With dead ends: 64235 [2021-07-09 18:23:37,166 INFO L226 Difference]: Without dead ends: 64063 [2021-07-09 18:23:37,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 3200.0ms TimeCoverageRelationStatistics Valid=889, Invalid=3271, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:23:37,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64063 states. [2021-07-09 18:23:38,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64063 to 36112. [2021-07-09 18:23:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36112 states, 36111 states have (on average 4.140289662429731) internal successors, (149510), 36111 states have internal predecessors, (149510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:38,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36112 states to 36112 states and 149510 transitions. [2021-07-09 18:23:38,712 INFO L78 Accepts]: Start accepts. Automaton has 36112 states and 149510 transitions. Word has length 39 [2021-07-09 18:23:38,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:38,712 INFO L482 AbstractCegarLoop]: Abstraction has 36112 states and 149510 transitions. [2021-07-09 18:23:38,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:38,712 INFO L276 IsEmpty]: Start isEmpty. Operand 36112 states and 149510 transitions. [2021-07-09 18:23:38,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:38,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:38,797 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:39,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:39,013 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:39,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:39,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1386806843, now seen corresponding path program 28 times [2021-07-09 18:23:39,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:39,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574226368] [2021-07-09 18:23:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:39,346 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 18:23:39,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:39,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574226368] [2021-07-09 18:23:39,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574226368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:39,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791629439] [2021-07-09 18:23:39,346 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 18:23:39,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:23:39,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:39,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:23:39,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:39,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:23:39,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:39,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:39,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:39,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:23:39,662 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:23:39,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:23:39,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:39,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:39,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:39,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:23:39,721 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 18:23:39,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791629439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:39,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:39,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:23:39,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171581917] [2021-07-09 18:23:39,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:23:39,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:39,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:23:39,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:23:39,725 INFO L87 Difference]: Start difference. First operand 36112 states and 149510 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:41,911 INFO L93 Difference]: Finished difference Result 81804 states and 333218 transitions. [2021-07-09 18:23:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:23:41,911 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:42,284 INFO L225 Difference]: With dead ends: 81804 [2021-07-09 18:23:42,284 INFO L226 Difference]: Without dead ends: 81722 [2021-07-09 18:23:42,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1239.1ms TimeCoverageRelationStatistics Valid=399, Invalid=1857, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:23:42,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81722 states. [2021-07-09 18:23:43,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81722 to 36088. [2021-07-09 18:23:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36088 states, 36087 states have (on average 4.143431152492587) internal successors, (149524), 36087 states have internal predecessors, (149524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:44,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36088 states to 36088 states and 149524 transitions. [2021-07-09 18:23:44,436 INFO L78 Accepts]: Start accepts. Automaton has 36088 states and 149524 transitions. Word has length 39 [2021-07-09 18:23:44,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:44,437 INFO L482 AbstractCegarLoop]: Abstraction has 36088 states and 149524 transitions. [2021-07-09 18:23:44,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:44,437 INFO L276 IsEmpty]: Start isEmpty. Operand 36088 states and 149524 transitions. [2021-07-09 18:23:44,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:44,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:44,540 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:44,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 18:23:44,757 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:44,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:44,757 INFO L82 PathProgramCache]: Analyzing trace with hash -835335761, now seen corresponding path program 29 times [2021-07-09 18:23:44,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:44,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069921333] [2021-07-09 18:23:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:45,121 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 18:23:45,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:45,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069921333] [2021-07-09 18:23:45,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069921333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:45,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788274382] [2021-07-09 18:23:45,121 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 18:23:45,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:23:45,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:45,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:23:45,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:45,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:45,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-07-09 18:23:45,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:45,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:45,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:45,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:42 [2021-07-09 18:23:45,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:23:45,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:45,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:45,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:45,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:22 [2021-07-09 18:23:45,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:45,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:45,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:45,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:45,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-07-09 18:23:45,587 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:45,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:45,594 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 18:23:45,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-07-09 18:23:45,648 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 18:23:45,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788274382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:45,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:45,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:23:45,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841775981] [2021-07-09 18:23:45,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:23:45,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:45,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:23:45,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:23:45,650 INFO L87 Difference]: Start difference. First operand 36088 states and 149524 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:47,842 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-07-09 18:23:50,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:50,086 INFO L93 Difference]: Finished difference Result 69670 states and 283586 transitions. [2021-07-09 18:23:50,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:23:50,086 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:50,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:50,364 INFO L225 Difference]: With dead ends: 69670 [2021-07-09 18:23:50,364 INFO L226 Difference]: Without dead ends: 69241 [2021-07-09 18:23:50,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 3031.5ms TimeCoverageRelationStatistics Valid=919, Invalid=5723, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:23:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69241 states. [2021-07-09 18:23:51,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69241 to 36951. [2021-07-09 18:23:51,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36951 states, 36950 states have (on average 4.1375372124492555) internal successors, (152882), 36950 states have internal predecessors, (152882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36951 states to 36951 states and 152882 transitions. [2021-07-09 18:23:51,916 INFO L78 Accepts]: Start accepts. Automaton has 36951 states and 152882 transitions. Word has length 39 [2021-07-09 18:23:51,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:51,916 INFO L482 AbstractCegarLoop]: Abstraction has 36951 states and 152882 transitions. [2021-07-09 18:23:51,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:51,916 INFO L276 IsEmpty]: Start isEmpty. Operand 36951 states and 152882 transitions. [2021-07-09 18:23:52,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:52,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:52,006 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:52,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:52,223 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:52,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:52,223 INFO L82 PathProgramCache]: Analyzing trace with hash 976519855, now seen corresponding path program 30 times [2021-07-09 18:23:52,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:52,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150241675] [2021-07-09 18:23:52,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:52,782 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 18:23:52,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:52,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150241675] [2021-07-09 18:23:52,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150241675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:52,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83141494] [2021-07-09 18:23:52,783 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 18:23:52,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:23:52,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:52,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 18:23:52,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:53,013 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:23:53,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:23:53,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:53,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:53,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:53,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:24 [2021-07-09 18:23:53,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:23:53,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:53,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:53,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:53,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-09 18:23:53,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:53,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:23:53,108 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:53,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:53,116 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 18:23:53,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:23:53,164 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 18:23:53,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83141494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:53,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:53,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:23:53,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729678031] [2021-07-09 18:23:53,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:23:53,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:53,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:23:53,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:23:53,165 INFO L87 Difference]: Start difference. First operand 36951 states and 152882 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:55,676 INFO L93 Difference]: Finished difference Result 69773 states and 285641 transitions. [2021-07-09 18:23:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:23:55,676 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:23:55,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:55,941 INFO L225 Difference]: With dead ends: 69773 [2021-07-09 18:23:55,941 INFO L226 Difference]: Without dead ends: 69718 [2021-07-09 18:23:55,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1486.3ms TimeCoverageRelationStatistics Valid=414, Invalid=2136, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:23:56,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69718 states. [2021-07-09 18:23:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69718 to 37115. [2021-07-09 18:23:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37115 states, 37114 states have (on average 4.138114997036159) internal successors, (153582), 37114 states have internal predecessors, (153582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:57,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37115 states to 37115 states and 153582 transitions. [2021-07-09 18:23:57,525 INFO L78 Accepts]: Start accepts. Automaton has 37115 states and 153582 transitions. Word has length 39 [2021-07-09 18:23:57,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:57,525 INFO L482 AbstractCegarLoop]: Abstraction has 37115 states and 153582 transitions. [2021-07-09 18:23:57,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 37115 states and 153582 transitions. [2021-07-09 18:23:57,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:23:57,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:57,623 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:57,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:57,840 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:57,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:57,840 INFO L82 PathProgramCache]: Analyzing trace with hash 747788741, now seen corresponding path program 31 times [2021-07-09 18:23:57,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:57,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852675454] [2021-07-09 18:23:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:58,626 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 18:23:58,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:58,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852675454] [2021-07-09 18:23:58,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852675454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:58,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576672597] [2021-07-09 18:23:58,626 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 18:23:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:58,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:23:58,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:58,969 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:23:58,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:23:58,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:58,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:58,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:58,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-07-09 18:23:59,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:23:59,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:59,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:59,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:59,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:23:59,146 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 18:23:59,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576672597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:59,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:59,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:23:59,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461647607] [2021-07-09 18:23:59,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:23:59,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:59,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:23:59,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:23:59,147 INFO L87 Difference]: Start difference. First operand 37115 states and 153582 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:01,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:01,689 INFO L93 Difference]: Finished difference Result 79233 states and 321882 transitions. [2021-07-09 18:24:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:24:01,690 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:01,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:02,029 INFO L225 Difference]: With dead ends: 79233 [2021-07-09 18:24:02,029 INFO L226 Difference]: Without dead ends: 79017 [2021-07-09 18:24:02,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1899.2ms TimeCoverageRelationStatistics Valid=437, Invalid=2215, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:24:02,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79017 states. [2021-07-09 18:24:03,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79017 to 36721. [2021-07-09 18:24:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36721 states, 36720 states have (on average 4.142184095860566) internal successors, (152101), 36720 states have internal predecessors, (152101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36721 states to 36721 states and 152101 transitions. [2021-07-09 18:24:03,630 INFO L78 Accepts]: Start accepts. Automaton has 36721 states and 152101 transitions. Word has length 39 [2021-07-09 18:24:03,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:03,630 INFO L482 AbstractCegarLoop]: Abstraction has 36721 states and 152101 transitions. [2021-07-09 18:24:03,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:03,631 INFO L276 IsEmpty]: Start isEmpty. Operand 36721 states and 152101 transitions. [2021-07-09 18:24:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:03,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:03,710 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:03,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 18:24:03,926 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:03,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:03,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1618032043, now seen corresponding path program 32 times [2021-07-09 18:24:03,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:03,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492998176] [2021-07-09 18:24:03,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:04,364 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 18:24:04,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:04,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492998176] [2021-07-09 18:24:04,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492998176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:04,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172185073] [2021-07-09 18:24:04,365 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 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 18:24:04,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:24:04,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:04,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:24:04,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:04,897 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:24:04,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:24:04,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:04,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:04,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:04,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-09 18:24:04,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:24:04,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:04,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:04,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:04,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:24:04,992 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 18:24:04,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172185073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:04,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:04,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:24:04,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638248423] [2021-07-09 18:24:04,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:24:04,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:04,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:24:04,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:24:04,993 INFO L87 Difference]: Start difference. First operand 36721 states and 152101 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:06,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:06,943 INFO L93 Difference]: Finished difference Result 65192 states and 266420 transitions. [2021-07-09 18:24:06,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:24:06,943 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:06,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:07,477 INFO L225 Difference]: With dead ends: 65192 [2021-07-09 18:24:07,478 INFO L226 Difference]: Without dead ends: 64944 [2021-07-09 18:24:07,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1150.6ms TimeCoverageRelationStatistics Valid=335, Invalid=1471, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:24:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64944 states. [2021-07-09 18:24:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64944 to 36907. [2021-07-09 18:24:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36907 states, 36906 states have (on average 4.140275293990137) internal successors, (152801), 36906 states have internal predecessors, (152801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36907 states to 36907 states and 152801 transitions. [2021-07-09 18:24:08,890 INFO L78 Accepts]: Start accepts. Automaton has 36907 states and 152801 transitions. Word has length 39 [2021-07-09 18:24:08,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:08,890 INFO L482 AbstractCegarLoop]: Abstraction has 36907 states and 152801 transitions. [2021-07-09 18:24:08,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:08,890 INFO L276 IsEmpty]: Start isEmpty. Operand 36907 states and 152801 transitions. [2021-07-09 18:24:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:09,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:09,264 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:09,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:09,480 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:09,481 INFO L82 PathProgramCache]: Analyzing trace with hash 980871553, now seen corresponding path program 33 times [2021-07-09 18:24:09,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:09,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081974820] [2021-07-09 18:24:09,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:09,869 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 18:24:09,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:09,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081974820] [2021-07-09 18:24:09,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081974820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:09,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057022650] [2021-07-09 18:24:09,869 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 18:24:09,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:24:09,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:09,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:24:09,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:10,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:10,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:24:10,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:10,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:10,310 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 1 xjuncts. [2021-07-09 18:24:10,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:64 [2021-07-09 18:24:10,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:10,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:10,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-07-09 18:24:10,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:10,452 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:24:10,453 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-07-09 18:24:10,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:10,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:10,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:10,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-07-09 18:24:10,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:10,482 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:24:10,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-07-09 18:24:10,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:10,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:10,596 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 4 xjuncts. [2021-07-09 18:24:10,596 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:233, output treesize:216 [2021-07-09 18:24:10,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:10,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:24:10,833 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:10,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:10,851 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 18:24:10,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:45 [2021-07-09 18:24:11,223 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 18:24:11,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057022650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:11,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:11,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-09 18:24:11,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906417455] [2021-07-09 18:24:11,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:24:11,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:11,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:24:11,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:24:11,225 INFO L87 Difference]: Start difference. First operand 36907 states and 152801 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:13,806 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 71 [2021-07-09 18:24:16,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:16,488 INFO L93 Difference]: Finished difference Result 77297 states and 311441 transitions. [2021-07-09 18:24:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:24:16,489 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:16,773 INFO L225 Difference]: With dead ends: 77297 [2021-07-09 18:24:16,774 INFO L226 Difference]: Without dead ends: 76962 [2021-07-09 18:24:16,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2466 ImplicationChecksByTransitivity, 4440.5ms TimeCoverageRelationStatistics Valid=1240, Invalid=6242, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:24:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76962 states. [2021-07-09 18:24:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76962 to 37046. [2021-07-09 18:24:18,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37046 states, 37045 states have (on average 4.137454447293832) internal successors, (153272), 37045 states have internal predecessors, (153272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37046 states to 37046 states and 153272 transitions. [2021-07-09 18:24:18,568 INFO L78 Accepts]: Start accepts. Automaton has 37046 states and 153272 transitions. Word has length 39 [2021-07-09 18:24:18,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:18,568 INFO L482 AbstractCegarLoop]: Abstraction has 37046 states and 153272 transitions. [2021-07-09 18:24:18,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 37046 states and 153272 transitions. [2021-07-09 18:24:19,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:19,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:19,115 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:19,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 18:24:19,315 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:19,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:19,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1184792299, now seen corresponding path program 34 times [2021-07-09 18:24:19,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:19,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088951072] [2021-07-09 18:24:19,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:19,752 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 18:24:19,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:19,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088951072] [2021-07-09 18:24:19,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088951072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:19,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127552541] [2021-07-09 18:24:19,753 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 18:24:19,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:24:19,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:19,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:24:19,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:20,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:24:20,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:20,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:20,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:20,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:24:20,056 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:24:20,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:24:20,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:20,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:20,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:20,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:24:20,109 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 18:24:20,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127552541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:20,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:20,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:24:20,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644262825] [2021-07-09 18:24:20,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:24:20,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:20,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:24:20,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:24:20,110 INFO L87 Difference]: Start difference. First operand 37046 states and 153272 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:22,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:22,303 INFO L93 Difference]: Finished difference Result 69957 states and 285446 transitions. [2021-07-09 18:24:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:24:22,304 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:22,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:22,637 INFO L225 Difference]: With dead ends: 69957 [2021-07-09 18:24:22,638 INFO L226 Difference]: Without dead ends: 69867 [2021-07-09 18:24:22,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1089.9ms TimeCoverageRelationStatistics Valid=315, Invalid=1407, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:24:22,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69867 states. [2021-07-09 18:24:24,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69867 to 37170. [2021-07-09 18:24:24,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37170 states, 37169 states have (on average 4.137749199601819) internal successors, (153796), 37169 states have internal predecessors, (153796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37170 states to 37170 states and 153796 transitions. [2021-07-09 18:24:24,239 INFO L78 Accepts]: Start accepts. Automaton has 37170 states and 153796 transitions. Word has length 39 [2021-07-09 18:24:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:24,240 INFO L482 AbstractCegarLoop]: Abstraction has 37170 states and 153796 transitions. [2021-07-09 18:24:24,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 37170 states and 153796 transitions. [2021-07-09 18:24:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:24,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:24,324 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:24,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:24,540 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:24,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:24,540 INFO L82 PathProgramCache]: Analyzing trace with hash -946859157, now seen corresponding path program 35 times [2021-07-09 18:24:24,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:24,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76075141] [2021-07-09 18:24:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:24,939 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 18:24:24,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:24,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76075141] [2021-07-09 18:24:24,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76075141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:24,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029140869] [2021-07-09 18:24:24,939 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 18:24:24,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:24:24,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:24,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:24:24,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:25,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:24:25,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:25,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:25,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-09 18:24:25,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-07-09 18:24:25,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:25,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-07-09 18:24:25,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:25,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:25,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:24:25,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:37 [2021-07-09 18:24:25,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:25,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:25,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-07-09 18:24:25,745 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:25,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:25,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:25,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 18:24:25,814 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 18:24:25,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029140869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:25,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:25,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:24:25,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689850637] [2021-07-09 18:24:25,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:24:25,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:25,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:24:25,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:24:25,815 INFO L87 Difference]: Start difference. First operand 37170 states and 153796 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:32,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:32,652 INFO L93 Difference]: Finished difference Result 120785 states and 490537 transitions. [2021-07-09 18:24:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:24:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:33,204 INFO L225 Difference]: With dead ends: 120785 [2021-07-09 18:24:33,204 INFO L226 Difference]: Without dead ends: 120491 [2021-07-09 18:24:33,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2480 ImplicationChecksByTransitivity, 4201.9ms TimeCoverageRelationStatistics Valid=1442, Invalid=7114, Unknown=0, NotChecked=0, Total=8556 [2021-07-09 18:24:33,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120491 states. [2021-07-09 18:24:35,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120491 to 36914. [2021-07-09 18:24:35,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36914 states, 36913 states have (on average 4.138812884349687) internal successors, (152776), 36913 states have internal predecessors, (152776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36914 states to 36914 states and 152776 transitions. [2021-07-09 18:24:35,645 INFO L78 Accepts]: Start accepts. Automaton has 36914 states and 152776 transitions. Word has length 39 [2021-07-09 18:24:35,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:35,646 INFO L482 AbstractCegarLoop]: Abstraction has 36914 states and 152776 transitions. [2021-07-09 18:24:35,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:35,646 INFO L276 IsEmpty]: Start isEmpty. Operand 36914 states and 152776 transitions. [2021-07-09 18:24:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:35,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:35,728 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:35,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:35,944 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:35,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:35,944 INFO L82 PathProgramCache]: Analyzing trace with hash 475346227, now seen corresponding path program 36 times [2021-07-09 18:24:35,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:35,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079132029] [2021-07-09 18:24:35,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:36,304 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 18:24:36,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:36,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079132029] [2021-07-09 18:24:36,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079132029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:36,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547198296] [2021-07-09 18:24:36,305 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 18:24:36,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:24:36,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:36,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:24:36,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:36,776 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-07-09 18:24:36,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:36,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-07-09 18:24:36,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:36,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:36,818 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 1 xjuncts. [2021-07-09 18:24:36,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:60 [2021-07-09 18:24:36,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:36,947 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-07-09 18:24:36,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:24:36,979 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-09 18:24:36,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:24:36,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:36,995 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:24:36,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:24:36,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:37,028 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-09 18:24:37,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 46 [2021-07-09 18:24:37,030 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:37,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:37,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:24:37,109 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:217, output treesize:149 [2021-07-09 18:24:37,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:37,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:24:37,339 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:37,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:37,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:37,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 18:24:37,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:37,412 INFO L628 ElimStorePlain]: treesize reduction 22, result has 64.5 percent of original size [2021-07-09 18:24:37,416 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 18:24:37,416 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:74, output treesize:41 [2021-07-09 18:24:37,548 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 18:24:37,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547198296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:37,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:37,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:24:37,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780122848] [2021-07-09 18:24:37,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:24:37,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:37,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:24:37,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:24:37,549 INFO L87 Difference]: Start difference. First operand 36914 states and 152776 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:38,345 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-07-09 18:24:40,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:40,676 INFO L93 Difference]: Finished difference Result 72719 states and 295712 transitions. [2021-07-09 18:24:40,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:24:40,677 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:40,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:41,171 INFO L225 Difference]: With dead ends: 72719 [2021-07-09 18:24:41,171 INFO L226 Difference]: Without dead ends: 72609 [2021-07-09 18:24:41,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 2617.6ms TimeCoverageRelationStatistics Valid=875, Invalid=3681, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:24:41,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72609 states. [2021-07-09 18:24:42,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72609 to 37105. [2021-07-09 18:24:42,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37105 states, 37104 states have (on average 4.1379905131522206) internal successors, (153536), 37104 states have internal predecessors, (153536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37105 states to 37105 states and 153536 transitions. [2021-07-09 18:24:42,702 INFO L78 Accepts]: Start accepts. Automaton has 37105 states and 153536 transitions. Word has length 39 [2021-07-09 18:24:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:42,704 INFO L482 AbstractCegarLoop]: Abstraction has 37105 states and 153536 transitions. [2021-07-09 18:24:42,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 37105 states and 153536 transitions. [2021-07-09 18:24:42,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:42,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:42,786 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:43,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 18:24:43,001 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:43,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:43,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1206490683, now seen corresponding path program 37 times [2021-07-09 18:24:43,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:43,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513895321] [2021-07-09 18:24:43,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:43,420 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 18:24:43,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:43,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513895321] [2021-07-09 18:24:43,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513895321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:43,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769782683] [2021-07-09 18:24:43,420 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 18:24:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:43,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:24:43,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:43,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:24:43,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:43,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:43,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:43,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:24:43,700 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:24:43,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:24:43,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:43,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:43,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:43,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:15 [2021-07-09 18:24:43,773 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 18:24:43,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769782683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:43,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:43,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:24:43,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582413404] [2021-07-09 18:24:43,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:24:43,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:43,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:24:43,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:24:43,774 INFO L87 Difference]: Start difference. First operand 37105 states and 153536 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:44,344 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-07-09 18:24:46,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:46,067 INFO L93 Difference]: Finished difference Result 87448 states and 357230 transitions. [2021-07-09 18:24:46,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:24:46,067 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:46,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:46,593 INFO L225 Difference]: With dead ends: 87448 [2021-07-09 18:24:46,593 INFO L226 Difference]: Without dead ends: 87393 [2021-07-09 18:24:46,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1451.5ms TimeCoverageRelationStatistics Valid=350, Invalid=1630, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:24:46,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87393 states. [2021-07-09 18:24:48,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87393 to 37362. [2021-07-09 18:24:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37362 states, 37361 states have (on average 4.1416450309145905) internal successors, (154736), 37361 states have internal predecessors, (154736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:48,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37362 states to 37362 states and 154736 transitions. [2021-07-09 18:24:48,182 INFO L78 Accepts]: Start accepts. Automaton has 37362 states and 154736 transitions. Word has length 39 [2021-07-09 18:24:48,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:48,182 INFO L482 AbstractCegarLoop]: Abstraction has 37362 states and 154736 transitions. [2021-07-09 18:24:48,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:48,182 INFO L276 IsEmpty]: Start isEmpty. Operand 37362 states and 154736 transitions. [2021-07-09 18:24:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:48,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:48,267 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:48,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 18:24:48,480 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:48,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:48,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1832087599, now seen corresponding path program 38 times [2021-07-09 18:24:48,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:48,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538084770] [2021-07-09 18:24:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:48,755 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 18:24:48,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:48,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538084770] [2021-07-09 18:24:48,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538084770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:48,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934690115] [2021-07-09 18:24:48,755 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 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 18:24:48,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:24:48,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:48,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:24:48,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:48,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:24:48,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:48,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:48,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:48,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:24:49,046 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:24:49,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:24:49,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:49,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:49,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:49,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:24:49,095 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 18:24:49,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934690115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:49,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:49,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:24:49,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078047688] [2021-07-09 18:24:49,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:24:49,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:49,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:24:49,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:24:49,096 INFO L87 Difference]: Start difference. First operand 37362 states and 154736 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:50,919 INFO L93 Difference]: Finished difference Result 73280 states and 301017 transitions. [2021-07-09 18:24:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:24:50,920 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:50,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:51,207 INFO L225 Difference]: With dead ends: 73280 [2021-07-09 18:24:51,207 INFO L226 Difference]: Without dead ends: 73225 [2021-07-09 18:24:51,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 867.4ms TimeCoverageRelationStatistics Valid=318, Invalid=1322, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:24:51,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73225 states. [2021-07-09 18:24:52,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73225 to 37610. [2021-07-09 18:24:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37610 states, 37609 states have (on average 4.143263580525938) internal successors, (155824), 37609 states have internal predecessors, (155824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37610 states to 37610 states and 155824 transitions. [2021-07-09 18:24:52,673 INFO L78 Accepts]: Start accepts. Automaton has 37610 states and 155824 transitions. Word has length 39 [2021-07-09 18:24:52,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:52,673 INFO L482 AbstractCegarLoop]: Abstraction has 37610 states and 155824 transitions. [2021-07-09 18:24:52,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:52,673 INFO L276 IsEmpty]: Start isEmpty. Operand 37610 states and 155824 transitions. [2021-07-09 18:24:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:24:52,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:52,760 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:52,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-09 18:24:52,977 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:52,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:52,977 INFO L82 PathProgramCache]: Analyzing trace with hash -973527573, now seen corresponding path program 39 times [2021-07-09 18:24:52,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:52,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640401600] [2021-07-09 18:24:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:53,445 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-07-09 18:24:53,580 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 18:24:53,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:53,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640401600] [2021-07-09 18:24:53,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640401600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:53,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149063649] [2021-07-09 18:24:53,581 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 18:24:53,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:24:53,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:53,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:24:53,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:53,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:53,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:24:53,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:53,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:53,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:53,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:66 [2021-07-09 18:24:54,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:54,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:54,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:24:54,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:54,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:54,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:54,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:24:54,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:54,068 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:24:54,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:24:54,070 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:54,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:54,081 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-07-09 18:24:54,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 1 [2021-07-09 18:24:54,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:54,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:54,146 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 18:24:54,146 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:245, output treesize:189 [2021-07-09 18:24:54,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:54,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:24:54,257 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:54,367 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-07-09 18:24:54,368 INFO L628 ElimStorePlain]: treesize reduction 27, result has 83.5 percent of original size [2021-07-09 18:24:54,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:54,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:24:54,377 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:54,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:54,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:54,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:24:54,438 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:54,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:54,495 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 18:24:54,496 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:165, output treesize:152 [2021-07-09 18:24:54,721 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 18:24:54,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149063649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:54,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:54,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:24:54,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353639116] [2021-07-09 18:24:54,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:24:54,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:54,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:24:54,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:24:54,722 INFO L87 Difference]: Start difference. First operand 37610 states and 155824 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:55,493 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-07-09 18:24:56,623 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-07-09 18:24:57,604 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-07-09 18:24:57,935 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-07-09 18:24:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:59,048 INFO L93 Difference]: Finished difference Result 72090 states and 292918 transitions. [2021-07-09 18:24:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:24:59,048 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:24:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:59,320 INFO L225 Difference]: With dead ends: 72090 [2021-07-09 18:24:59,320 INFO L226 Difference]: Without dead ends: 71980 [2021-07-09 18:24:59,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 3664.0ms TimeCoverageRelationStatistics Valid=850, Invalid=3572, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:24:59,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71980 states. [2021-07-09 18:25:00,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71980 to 37688. [2021-07-09 18:25:00,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37688 states, 37687 states have (on average 4.1424894525963865) internal successors, (156118), 37687 states have internal predecessors, (156118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37688 states to 37688 states and 156118 transitions. [2021-07-09 18:25:01,248 INFO L78 Accepts]: Start accepts. Automaton has 37688 states and 156118 transitions. Word has length 39 [2021-07-09 18:25:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:01,248 INFO L482 AbstractCegarLoop]: Abstraction has 37688 states and 156118 transitions. [2021-07-09 18:25:01,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 37688 states and 156118 transitions. [2021-07-09 18:25:01,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:01,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:01,360 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:01,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:01,569 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:01,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:01,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1451354431, now seen corresponding path program 40 times [2021-07-09 18:25:01,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:01,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916921105] [2021-07-09 18:25:01,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:01,924 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 18:25:01,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:01,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916921105] [2021-07-09 18:25:01,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916921105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:01,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070850656] [2021-07-09 18:25:01,925 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 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 18:25:01,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:25:01,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:01,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:25:01,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:02,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:25:02,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:02,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:02,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:02,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:25:02,254 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:25:02,254 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:25:02,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:02,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:02,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:02,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:25:02,306 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 18:25:02,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070850656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:02,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:02,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:25:02,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536847334] [2021-07-09 18:25:02,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:25:02,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:02,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:25:02,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:25:02,307 INFO L87 Difference]: Start difference. First operand 37688 states and 156118 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:04,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:04,965 INFO L93 Difference]: Finished difference Result 86865 states and 355556 transitions. [2021-07-09 18:25:04,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:25:04,966 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:04,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:05,356 INFO L225 Difference]: With dead ends: 86865 [2021-07-09 18:25:05,356 INFO L226 Difference]: Without dead ends: 86810 [2021-07-09 18:25:05,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1140.1ms TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:25:05,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86810 states. [2021-07-09 18:25:07,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86810 to 37742. [2021-07-09 18:25:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37742 states, 37741 states have (on average 4.146207042738666) internal successors, (156482), 37741 states have internal predecessors, (156482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37742 states to 37742 states and 156482 transitions. [2021-07-09 18:25:07,745 INFO L78 Accepts]: Start accepts. Automaton has 37742 states and 156482 transitions. Word has length 39 [2021-07-09 18:25:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:07,745 INFO L482 AbstractCegarLoop]: Abstraction has 37742 states and 156482 transitions. [2021-07-09 18:25:07,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 37742 states and 156482 transitions. [2021-07-09 18:25:07,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:07,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:07,834 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:08,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-09 18:25:08,051 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:08,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:08,051 INFO L82 PathProgramCache]: Analyzing trace with hash -653921383, now seen corresponding path program 41 times [2021-07-09 18:25:08,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:08,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395194930] [2021-07-09 18:25:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:08,417 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 18:25:08,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:08,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395194930] [2021-07-09 18:25:08,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395194930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:08,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387749566] [2021-07-09 18:25:08,417 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 18:25:08,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:25:08,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:08,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:25:08,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:08,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:08,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 49 [2021-07-09 18:25:08,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:08,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:08,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:08,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:50 [2021-07-09 18:25:08,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:25:08,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:08,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:08,915 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 1 xjuncts. [2021-07-09 18:25:08,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:25:08,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:08,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:08,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:09,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:09,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-07-09 18:25:09,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:25:09,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:09,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:09,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 18:25:09,073 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 18:25:09,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387749566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:09,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:09,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:25:09,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492348397] [2021-07-09 18:25:09,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:25:09,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:09,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:25:09,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:09,074 INFO L87 Difference]: Start difference. First operand 37742 states and 156482 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:13,556 INFO L93 Difference]: Finished difference Result 68588 states and 279888 transitions. [2021-07-09 18:25:13,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:25:13,557 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:13,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:13,888 INFO L225 Difference]: With dead ends: 68588 [2021-07-09 18:25:13,888 INFO L226 Difference]: Without dead ends: 68367 [2021-07-09 18:25:13,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 3125.7ms TimeCoverageRelationStatistics Valid=756, Invalid=4356, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:25:13,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68367 states. [2021-07-09 18:25:15,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68367 to 38069. [2021-07-09 18:25:15,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38069 states, 38068 states have (on average 4.141194704213513) internal successors, (157647), 38068 states have internal predecessors, (157647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:15,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38069 states to 38069 states and 157647 transitions. [2021-07-09 18:25:15,606 INFO L78 Accepts]: Start accepts. Automaton has 38069 states and 157647 transitions. Word has length 39 [2021-07-09 18:25:15,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:15,607 INFO L482 AbstractCegarLoop]: Abstraction has 38069 states and 157647 transitions. [2021-07-09 18:25:15,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:15,607 INFO L276 IsEmpty]: Start isEmpty. Operand 38069 states and 157647 transitions. [2021-07-09 18:25:15,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:15,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:15,704 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:15,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:15,921 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:15,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1516384875, now seen corresponding path program 42 times [2021-07-09 18:25:15,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:15,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992200716] [2021-07-09 18:25:15,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:16,200 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-07-09 18:25:16,518 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 18:25:16,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:16,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992200716] [2021-07-09 18:25:16,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992200716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:16,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423737429] [2021-07-09 18:25:16,518 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 18:25:16,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:25:16,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:16,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:25:16,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:16,871 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:25:16,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:25:16,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:16,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:16,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:16,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:28 [2021-07-09 18:25:16,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:16,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2021-07-09 18:25:16,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:16,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:16,996 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 1 xjuncts. [2021-07-09 18:25:16,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2021-07-09 18:25:17,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:17,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:25:17,104 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:17,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:17,126 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 18:25:17,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:51 [2021-07-09 18:25:17,245 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 18:25:17,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423737429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:17,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:17,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-07-09 18:25:17,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963383462] [2021-07-09 18:25:17,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:25:17,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:17,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:25:17,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:25:17,247 INFO L87 Difference]: Start difference. First operand 38069 states and 157647 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:22,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:22,627 INFO L93 Difference]: Finished difference Result 76057 states and 306680 transitions. [2021-07-09 18:25:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:25:22,627 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:22,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:23,297 INFO L225 Difference]: With dead ends: 76057 [2021-07-09 18:25:23,297 INFO L226 Difference]: Without dead ends: 75706 [2021-07-09 18:25:23,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 3962.9ms TimeCoverageRelationStatistics Valid=992, Invalid=5980, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:25:23,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75706 states. [2021-07-09 18:25:24,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75706 to 37904. [2021-07-09 18:25:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37904 states, 37903 states have (on average 4.142891064031871) internal successors, (157028), 37903 states have internal predecessors, (157028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:25,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37904 states to 37904 states and 157028 transitions. [2021-07-09 18:25:25,170 INFO L78 Accepts]: Start accepts. Automaton has 37904 states and 157028 transitions. Word has length 39 [2021-07-09 18:25:25,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:25,170 INFO L482 AbstractCegarLoop]: Abstraction has 37904 states and 157028 transitions. [2021-07-09 18:25:25,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:25,171 INFO L276 IsEmpty]: Start isEmpty. Operand 37904 states and 157028 transitions. [2021-07-09 18:25:25,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:25,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:25,274 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:25,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-09 18:25:25,491 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:25,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:25,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1495860655, now seen corresponding path program 43 times [2021-07-09 18:25:25,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:25,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332986945] [2021-07-09 18:25:25,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:25,908 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 18:25:25,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:25,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332986945] [2021-07-09 18:25:25,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332986945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:25,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864315820] [2021-07-09 18:25:25,908 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 18:25:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:25,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:25:25,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:26,280 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-07-09 18:25:26,410 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:25:26,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:25:26,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:26,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:26,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:26,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-09 18:25:26,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:25:26,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:26,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:26,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:26,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:25:26,524 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 18:25:26,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864315820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:26,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:26,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:25:26,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589869363] [2021-07-09 18:25:26,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:25:26,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:26,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:25:26,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:25:26,526 INFO L87 Difference]: Start difference. First operand 37904 states and 157028 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:28,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:28,324 INFO L93 Difference]: Finished difference Result 66378 states and 271263 transitions. [2021-07-09 18:25:28,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:25:28,325 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:28,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:28,600 INFO L225 Difference]: With dead ends: 66378 [2021-07-09 18:25:28,600 INFO L226 Difference]: Without dead ends: 66130 [2021-07-09 18:25:28,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1265.4ms TimeCoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:25:28,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66130 states. [2021-07-09 18:25:29,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66130 to 38078. [2021-07-09 18:25:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38078 states, 38077 states have (on average 4.141345168999659) internal successors, (157690), 38077 states have internal predecessors, (157690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38078 states to 38078 states and 157690 transitions. [2021-07-09 18:25:30,028 INFO L78 Accepts]: Start accepts. Automaton has 38078 states and 157690 transitions. Word has length 39 [2021-07-09 18:25:30,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:30,028 INFO L482 AbstractCegarLoop]: Abstraction has 38078 states and 157690 transitions. [2021-07-09 18:25:30,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:30,028 INFO L276 IsEmpty]: Start isEmpty. Operand 38078 states and 157690 transitions. [2021-07-09 18:25:30,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:30,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:30,361 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:30,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:30,562 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:30,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:30,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1172159941, now seen corresponding path program 44 times [2021-07-09 18:25:30,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:30,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567804085] [2021-07-09 18:25:30,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:30,941 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 18:25:30,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:30,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567804085] [2021-07-09 18:25:30,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567804085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:30,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676475041] [2021-07-09 18:25:30,941 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 18:25:30,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:25:30,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:30,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:25:30,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:31,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:25:31,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:31,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:31,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:31,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:25:31,238 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:25:31,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:25:31,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:31,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:31,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:31,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:25:31,285 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 18:25:31,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676475041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:31,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:31,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:25:31,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810588428] [2021-07-09 18:25:31,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:25:31,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:31,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:25:31,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:25:31,286 INFO L87 Difference]: Start difference. First operand 38078 states and 157690 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:32,090 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-07-09 18:25:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:33,726 INFO L93 Difference]: Finished difference Result 83791 states and 340816 transitions. [2021-07-09 18:25:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:25:33,726 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:33,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:34,070 INFO L225 Difference]: With dead ends: 83791 [2021-07-09 18:25:34,071 INFO L226 Difference]: Without dead ends: 83639 [2021-07-09 18:25:34,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1357.4ms TimeCoverageRelationStatistics Valid=399, Invalid=1857, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:25:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83639 states. [2021-07-09 18:25:35,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83639 to 38148. [2021-07-09 18:25:35,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38148 states, 38147 states have (on average 4.14213437491808) internal successors, (158010), 38147 states have internal predecessors, (158010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38148 states to 38148 states and 158010 transitions. [2021-07-09 18:25:35,755 INFO L78 Accepts]: Start accepts. Automaton has 38148 states and 158010 transitions. Word has length 39 [2021-07-09 18:25:35,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:35,755 INFO L482 AbstractCegarLoop]: Abstraction has 38148 states and 158010 transitions. [2021-07-09 18:25:35,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 38148 states and 158010 transitions. [2021-07-09 18:25:36,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:36,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:36,110 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:36,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:36,329 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:36,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:36,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1376080687, now seen corresponding path program 45 times [2021-07-09 18:25:36,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:36,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703767432] [2021-07-09 18:25:36,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:36,760 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 18:25:36,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:36,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703767432] [2021-07-09 18:25:36,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703767432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:36,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894156128] [2021-07-09 18:25:36,760 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 18:25:36,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:25:36,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:36,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:25:36,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:37,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:37,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:37,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-07-09 18:25:37,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:37,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:37,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:37,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:82 [2021-07-09 18:25:37,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:37,343 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-07-09 18:25:37,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:25:37,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:37,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:37,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:25:37,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:37,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:37,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:37,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 58 [2021-07-09 18:25:37,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:37,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:37,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:37,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:25:37,399 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:37,500 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-07-09 18:25:37,501 INFO L628 ElimStorePlain]: treesize reduction 58, result has 71.3 percent of original size [2021-07-09 18:25:37,511 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 18:25:37,511 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:247, output treesize:206 [2021-07-09 18:25:37,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:37,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:25:37,629 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:37,914 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-07-09 18:25:37,914 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.6 percent of original size [2021-07-09 18:25:37,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:37,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:25:37,924 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:38,035 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-07-09 18:25:38,035 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.2 percent of original size [2021-07-09 18:25:38,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:38,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:25:38,044 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:38,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:38,107 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 18:25:38,108 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:168, output treesize:154 [2021-07-09 18:25:38,358 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 18:25:38,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894156128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:38,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:38,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:25:38,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716867344] [2021-07-09 18:25:38,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:25:38,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:38,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:25:38,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:25:38,359 INFO L87 Difference]: Start difference. First operand 38148 states and 158010 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:41,052 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2021-07-09 18:25:41,664 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-07-09 18:25:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:42,049 INFO L93 Difference]: Finished difference Result 69869 states and 283258 transitions. [2021-07-09 18:25:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:25:42,050 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:42,334 INFO L225 Difference]: With dead ends: 69869 [2021-07-09 18:25:42,335 INFO L226 Difference]: Without dead ends: 69705 [2021-07-09 18:25:42,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 3169.1ms TimeCoverageRelationStatistics Valid=781, Invalid=3001, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:25:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69705 states. [2021-07-09 18:25:43,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69705 to 38170. [2021-07-09 18:25:43,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38170 states, 38169 states have (on average 4.1419476538552225) internal successors, (158094), 38169 states have internal predecessors, (158094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38170 states to 38170 states and 158094 transitions. [2021-07-09 18:25:44,066 INFO L78 Accepts]: Start accepts. Automaton has 38170 states and 158094 transitions. Word has length 39 [2021-07-09 18:25:44,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:44,066 INFO L482 AbstractCegarLoop]: Abstraction has 38170 states and 158094 transitions. [2021-07-09 18:25:44,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:44,067 INFO L276 IsEmpty]: Start isEmpty. Operand 38170 states and 158094 transitions. [2021-07-09 18:25:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:44,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:44,497 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:44,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-07-09 18:25:44,698 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:44,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:44,698 INFO L82 PathProgramCache]: Analyzing trace with hash 898253829, now seen corresponding path program 46 times [2021-07-09 18:25:44,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:44,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49625331] [2021-07-09 18:25:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:45,095 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 18:25:45,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:45,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49625331] [2021-07-09 18:25:45,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49625331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:45,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469281902] [2021-07-09 18:25:45,095 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 18:25:45,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:25:45,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:45,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:25:45,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:45,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:25:45,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:45,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:45,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:45,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:25:45,458 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:25:45,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:25:45,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:45,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:45,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:45,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:25:45,510 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 18:25:45,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469281902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:45,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:45,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:25:45,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944915151] [2021-07-09 18:25:45,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:25:45,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:45,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:25:45,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:25:45,511 INFO L87 Difference]: Start difference. First operand 38170 states and 158094 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:47,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:47,878 INFO L93 Difference]: Finished difference Result 84103 states and 342659 transitions. [2021-07-09 18:25:47,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:25:47,878 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:47,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:48,261 INFO L225 Difference]: With dead ends: 84103 [2021-07-09 18:25:48,261 INFO L226 Difference]: Without dead ends: 84021 [2021-07-09 18:25:48,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1275.3ms TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:25:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84021 states. [2021-07-09 18:25:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84021 to 37868. [2021-07-09 18:25:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37868 states, 37867 states have (on average 4.143607890775609) internal successors, (156906), 37867 states have internal predecessors, (156906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37868 states to 37868 states and 156906 transitions. [2021-07-09 18:25:50,280 INFO L78 Accepts]: Start accepts. Automaton has 37868 states and 156906 transitions. Word has length 39 [2021-07-09 18:25:50,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:50,281 INFO L482 AbstractCegarLoop]: Abstraction has 37868 states and 156906 transitions. [2021-07-09 18:25:50,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 37868 states and 156906 transitions. [2021-07-09 18:25:50,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:50,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:50,649 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:50,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:50,865 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:50,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:50,865 INFO L82 PathProgramCache]: Analyzing trace with hash 575171183, now seen corresponding path program 47 times [2021-07-09 18:25:50,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:50,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985743931] [2021-07-09 18:25:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:51,270 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 18:25:51,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:51,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985743931] [2021-07-09 18:25:51,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985743931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:51,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305880163] [2021-07-09 18:25:51,270 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 18:25:51,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:25:51,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:51,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:25:51,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:51,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:51,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 47 [2021-07-09 18:25:51,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:51,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:51,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:51,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:43 [2021-07-09 18:25:51,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-09 18:25:51,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:51,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:51,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:51,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:18 [2021-07-09 18:25:51,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:51,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-07-09 18:25:51,869 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:51,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:51,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:51,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-07-09 18:25:51,951 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 18:25:51,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305880163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:51,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:51,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:25:51,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767405130] [2021-07-09 18:25:51,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:25:51,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:51,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:25:51,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:51,952 INFO L87 Difference]: Start difference. First operand 37868 states and 156906 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:52,384 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-07-09 18:25:56,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:56,313 INFO L93 Difference]: Finished difference Result 72342 states and 294304 transitions. [2021-07-09 18:25:56,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:25:56,313 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:25:56,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:56,665 INFO L225 Difference]: With dead ends: 72342 [2021-07-09 18:25:56,665 INFO L226 Difference]: Without dead ends: 72001 [2021-07-09 18:25:56,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 2734.6ms TimeCoverageRelationStatistics Valid=672, Invalid=4020, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:25:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72001 states. [2021-07-09 18:25:58,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72001 to 38419. [2021-07-09 18:25:58,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38419 states, 38418 states have (on average 4.137045135092925) internal successors, (158937), 38418 states have internal predecessors, (158937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38419 states to 38419 states and 158937 transitions. [2021-07-09 18:25:58,405 INFO L78 Accepts]: Start accepts. Automaton has 38419 states and 158937 transitions. Word has length 39 [2021-07-09 18:25:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:58,405 INFO L482 AbstractCegarLoop]: Abstraction has 38419 states and 158937 transitions. [2021-07-09 18:25:58,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 38419 states and 158937 transitions. [2021-07-09 18:25:58,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:25:58,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:58,507 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:58,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-09 18:25:58,724 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:58,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:58,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1727088047, now seen corresponding path program 48 times [2021-07-09 18:25:58,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:58,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908580157] [2021-07-09 18:25:58,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:58,976 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-07-09 18:25:59,306 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 18:25:59,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:59,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908580157] [2021-07-09 18:25:59,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908580157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:59,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135759336] [2021-07-09 18:25:59,307 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 18:25:59,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:25:59,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:59,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 18:25:59,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:59,570 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:25:59,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:25:59,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:59,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:59,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:59,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:33 [2021-07-09 18:25:59,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-09 18:25:59,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:59,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:59,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:25:59,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:18 [2021-07-09 18:25:59,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:59,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-07-09 18:25:59,669 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:59,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:59,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:59,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-07-09 18:25:59,723 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 18:25:59,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135759336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:59,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:59,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:25:59,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69585193] [2021-07-09 18:25:59,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:25:59,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:59,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:25:59,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:25:59,724 INFO L87 Difference]: Start difference. First operand 38419 states and 158937 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:00,437 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-07-09 18:26:03,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:03,120 INFO L93 Difference]: Finished difference Result 91087 states and 370453 transitions. [2021-07-09 18:26:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:26:03,120 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:03,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:03,517 INFO L225 Difference]: With dead ends: 91087 [2021-07-09 18:26:03,517 INFO L226 Difference]: Without dead ends: 90900 [2021-07-09 18:26:03,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1873.4ms TimeCoverageRelationStatistics Valid=576, Invalid=2964, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:26:03,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90900 states. [2021-07-09 18:26:05,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90900 to 38186. [2021-07-09 18:26:05,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38186 states, 38185 states have (on average 4.1405787612937015) internal successors, (158108), 38185 states have internal predecessors, (158108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:05,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38186 states to 38186 states and 158108 transitions. [2021-07-09 18:26:05,397 INFO L78 Accepts]: Start accepts. Automaton has 38186 states and 158108 transitions. Word has length 39 [2021-07-09 18:26:05,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:05,397 INFO L482 AbstractCegarLoop]: Abstraction has 38186 states and 158108 transitions. [2021-07-09 18:26:05,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 38186 states and 158108 transitions. [2021-07-09 18:26:05,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:05,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:05,496 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:05,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:05,712 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:05,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:05,713 INFO L82 PathProgramCache]: Analyzing trace with hash 251470469, now seen corresponding path program 49 times [2021-07-09 18:26:05,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:05,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213724699] [2021-07-09 18:26:05,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:06,182 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-07-09 18:26:06,330 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 18:26:06,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:06,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213724699] [2021-07-09 18:26:06,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213724699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:06,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878158155] [2021-07-09 18:26:06,331 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 18:26:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:06,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:26:06,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:06,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:26:06,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:06,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:06,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:06,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:26:06,643 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:26:06,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:26:06,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:06,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:06,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:06,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:26:06,692 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 18:26:06,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878158155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:06,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:06,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:26:06,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595583467] [2021-07-09 18:26:06,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:26:06,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:06,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:26:06,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:06,694 INFO L87 Difference]: Start difference. First operand 38186 states and 158108 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:09,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:09,237 INFO L93 Difference]: Finished difference Result 84472 states and 343708 transitions. [2021-07-09 18:26:09,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:26:09,238 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:09,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:09,559 INFO L225 Difference]: With dead ends: 84472 [2021-07-09 18:26:09,560 INFO L226 Difference]: Without dead ends: 84320 [2021-07-09 18:26:09,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1804.6ms TimeCoverageRelationStatistics Valid=411, Invalid=2039, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:26:09,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84320 states. [2021-07-09 18:26:10,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84320 to 38354. [2021-07-09 18:26:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38354 states, 38353 states have (on average 4.140797330065444) internal successors, (158812), 38353 states have internal predecessors, (158812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38354 states to 38354 states and 158812 transitions. [2021-07-09 18:26:11,191 INFO L78 Accepts]: Start accepts. Automaton has 38354 states and 158812 transitions. Word has length 39 [2021-07-09 18:26:11,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:11,191 INFO L482 AbstractCegarLoop]: Abstraction has 38354 states and 158812 transitions. [2021-07-09 18:26:11,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:11,192 INFO L276 IsEmpty]: Start isEmpty. Operand 38354 states and 158812 transitions. [2021-07-09 18:26:11,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:11,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:11,282 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:11,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-09 18:26:11,499 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:11,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:11,499 INFO L82 PathProgramCache]: Analyzing trace with hash 455391215, now seen corresponding path program 50 times [2021-07-09 18:26:11,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:11,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303877076] [2021-07-09 18:26:11,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:11,905 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-07-09 18:26:12,096 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 18:26:12,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:12,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303877076] [2021-07-09 18:26:12,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303877076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:12,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888598744] [2021-07-09 18:26:12,096 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 18:26:12,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:12,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:12,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:26:12,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:12,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:26:12,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:12,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:12,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:12,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:26:12,401 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:26:12,401 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:26:12,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:12,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:12,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:12,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:26:12,450 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 18:26:12,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888598744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:12,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:12,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:26:12,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532929265] [2021-07-09 18:26:12,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:26:12,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:12,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:26:12,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:12,451 INFO L87 Difference]: Start difference. First operand 38354 states and 158812 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:14,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:14,357 INFO L93 Difference]: Finished difference Result 72197 states and 294895 transitions. [2021-07-09 18:26:14,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:26:14,357 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:14,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:14,933 INFO L225 Difference]: With dead ends: 72197 [2021-07-09 18:26:14,933 INFO L226 Difference]: Without dead ends: 72091 [2021-07-09 18:26:14,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1359.9ms TimeCoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:26:15,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72091 states. [2021-07-09 18:26:15,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72091 to 38120. [2021-07-09 18:26:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38120 states, 38119 states have (on average 4.141661638552953) internal successors, (157876), 38119 states have internal predecessors, (157876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:16,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38120 states to 38120 states and 157876 transitions. [2021-07-09 18:26:16,481 INFO L78 Accepts]: Start accepts. Automaton has 38120 states and 157876 transitions. Word has length 39 [2021-07-09 18:26:16,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:16,481 INFO L482 AbstractCegarLoop]: Abstraction has 38120 states and 157876 transitions. [2021-07-09 18:26:16,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:16,481 INFO L276 IsEmpty]: Start isEmpty. Operand 38120 states and 157876 transitions. [2021-07-09 18:26:16,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:16,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:16,569 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:16,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-09 18:26:16,785 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:16,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:16,786 INFO L82 PathProgramCache]: Analyzing trace with hash -175003259, now seen corresponding path program 51 times [2021-07-09 18:26:16,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:16,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444559090] [2021-07-09 18:26:16,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:17,111 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 18:26:17,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:17,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444559090] [2021-07-09 18:26:17,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444559090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:17,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999919713] [2021-07-09 18:26:17,111 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 18:26:17,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:26:17,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:17,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:26:17,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:17,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-07-09 18:26:17,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:17,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:17,385 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 1 xjuncts. [2021-07-09 18:26:17,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:35 [2021-07-09 18:26:17,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:17,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:17,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-07-09 18:26:17,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:17,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:17,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 18:26:17,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:71 [2021-07-09 18:26:17,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:17,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:26:17,564 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:26:17,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:17,572 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 18:26:17,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:26:17,620 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 18:26:17,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999919713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:17,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:17,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:26:17,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039776579] [2021-07-09 18:26:17,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:26:17,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:17,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:26:17,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:26:17,621 INFO L87 Difference]: Start difference. First operand 38120 states and 157876 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:21,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:21,916 INFO L93 Difference]: Finished difference Result 83885 states and 339235 transitions. [2021-07-09 18:26:21,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:26:21,916 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:21,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:22,482 INFO L225 Difference]: With dead ends: 83885 [2021-07-09 18:26:22,482 INFO L226 Difference]: Without dead ends: 83494 [2021-07-09 18:26:22,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2690.6ms TimeCoverageRelationStatistics Valid=827, Invalid=4723, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:26:22,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83494 states. [2021-07-09 18:26:23,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83494 to 38451. [2021-07-09 18:26:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38451 states, 38450 states have (on average 4.140988296488946) internal successors, (159221), 38450 states have internal predecessors, (159221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:24,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38451 states to 38451 states and 159221 transitions. [2021-07-09 18:26:24,083 INFO L78 Accepts]: Start accepts. Automaton has 38451 states and 159221 transitions. Word has length 39 [2021-07-09 18:26:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:24,083 INFO L482 AbstractCegarLoop]: Abstraction has 38451 states and 159221 transitions. [2021-07-09 18:26:24,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:24,083 INFO L276 IsEmpty]: Start isEmpty. Operand 38451 states and 159221 transitions. [2021-07-09 18:26:24,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:24,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:24,167 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:24,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:24,384 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:24,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:24,384 INFO L82 PathProgramCache]: Analyzing trace with hash -448909371, now seen corresponding path program 52 times [2021-07-09 18:26:24,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:24,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796894885] [2021-07-09 18:26:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:24,850 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 18:26:24,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:24,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796894885] [2021-07-09 18:26:24,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796894885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:24,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123969250] [2021-07-09 18:26:24,851 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 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 18:26:24,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:24,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:24,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:26:24,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:25,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:26:25,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:25,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:25,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:25,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:26:25,171 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:26:25,171 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:26:25,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:25,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:25,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:25,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:26:25,220 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 18:26:25,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123969250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:25,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:25,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:26:25,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446518227] [2021-07-09 18:26:25,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:26:25,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:25,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:26:25,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:25,221 INFO L87 Difference]: Start difference. First operand 38451 states and 159221 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:27,586 INFO L93 Difference]: Finished difference Result 91888 states and 374497 transitions. [2021-07-09 18:26:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:26:27,587 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:27,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:28,350 INFO L225 Difference]: With dead ends: 91888 [2021-07-09 18:26:28,350 INFO L226 Difference]: Without dead ends: 91806 [2021-07-09 18:26:28,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1191.7ms TimeCoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:26:28,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91806 states. [2021-07-09 18:26:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91806 to 38617. [2021-07-09 18:26:29,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38617 states, 38616 states have (on average 4.140692977004351) internal successors, (159897), 38616 states have internal predecessors, (159897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:30,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38617 states to 38617 states and 159897 transitions. [2021-07-09 18:26:30,096 INFO L78 Accepts]: Start accepts. Automaton has 38617 states and 159897 transitions. Word has length 39 [2021-07-09 18:26:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:30,096 INFO L482 AbstractCegarLoop]: Abstraction has 38617 states and 159897 transitions. [2021-07-09 18:26:30,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand 38617 states and 159897 transitions. [2021-07-09 18:26:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:30,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:30,180 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:30,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-07-09 18:26:30,396 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:30,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:30,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1568844437, now seen corresponding path program 53 times [2021-07-09 18:26:30,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:30,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384445594] [2021-07-09 18:26:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:30,748 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 18:26:30,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:30,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384445594] [2021-07-09 18:26:30,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384445594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:30,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003596263] [2021-07-09 18:26:30,749 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 18:26:30,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:26:30,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:30,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:26:30,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:31,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:31,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-07-09 18:26:31,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:31,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:31,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:31,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:100 [2021-07-09 18:26:31,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:31,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:31,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2021-07-09 18:26:31,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:31,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:31,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:31,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:31,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:31,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2021-07-09 18:26:31,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:26:31,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:31,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:31,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:31,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:31,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2021-07-09 18:26:31,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:31,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:31,615 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 18:26:31,615 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:168, output treesize:90 [2021-07-09 18:26:31,701 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_10], 6=[q2]} [2021-07-09 18:26:31,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:31,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:31,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2021-07-09 18:26:31,719 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:31,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:31,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:31,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-07-09 18:26:31,780 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:26:31,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:31,820 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 18:26:31,820 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:110, output treesize:77 [2021-07-09 18:26:31,956 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 18:26:31,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003596263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:31,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:31,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:26:31,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20724044] [2021-07-09 18:26:31,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:26:31,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:31,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:26:31,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:26:31,957 INFO L87 Difference]: Start difference. First operand 38617 states and 159897 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:36,799 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-07-09 18:26:38,106 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2021-07-09 18:26:38,383 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-07-09 18:26:41,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:41,202 INFO L93 Difference]: Finished difference Result 103801 states and 418808 transitions. [2021-07-09 18:26:41,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-09 18:26:41,203 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:41,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:41,963 INFO L225 Difference]: With dead ends: 103801 [2021-07-09 18:26:41,963 INFO L226 Difference]: Without dead ends: 103476 [2021-07-09 18:26:41,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4998 ImplicationChecksByTransitivity, 7198.2ms TimeCoverageRelationStatistics Valid=2280, Invalid=12482, Unknown=0, NotChecked=0, Total=14762 [2021-07-09 18:26:42,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103476 states. [2021-07-09 18:26:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103476 to 38764. [2021-07-09 18:26:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38764 states, 38763 states have (on average 4.139566081056678) internal successors, (160462), 38763 states have internal predecessors, (160462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38764 states to 38764 states and 160462 transitions. [2021-07-09 18:26:43,779 INFO L78 Accepts]: Start accepts. Automaton has 38764 states and 160462 transitions. Word has length 39 [2021-07-09 18:26:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:43,779 INFO L482 AbstractCegarLoop]: Abstraction has 38764 states and 160462 transitions. [2021-07-09 18:26:43,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 38764 states and 160462 transitions. [2021-07-09 18:26:43,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:43,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:43,864 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:44,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-07-09 18:26:44,080 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:44,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:44,080 INFO L82 PathProgramCache]: Analyzing trace with hash -259731149, now seen corresponding path program 54 times [2021-07-09 18:26:44,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:44,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912212070] [2021-07-09 18:26:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:44,627 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 18:26:44,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:44,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912212070] [2021-07-09 18:26:44,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912212070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:44,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000926076] [2021-07-09 18:26:44,628 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 18:26:44,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:26:44,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:44,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:26:44,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:44,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:44,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-07-09 18:26:44,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:44,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:44,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-09 18:26:44,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:69 [2021-07-09 18:26:45,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:45,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:45,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-07-09 18:26:45,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:45,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:45,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:45,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2021-07-09 18:26:45,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:45,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:45,171 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-07-09 18:26:45,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 18:26:45,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:45,181 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-09 18:26:45,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:26:45,181 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:45,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:45,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:26:45,267 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:246, output treesize:116 [2021-07-09 18:26:45,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:45,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:26:45,444 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:26:45,540 INFO L628 ElimStorePlain]: treesize reduction 21, result has 83.2 percent of original size [2021-07-09 18:26:45,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:45,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:26:45,549 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:26:45,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:45,597 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 18:26:45,597 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:112 [2021-07-09 18:26:45,982 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 18:26:45,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000926076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:45,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:45,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:26:45,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242135699] [2021-07-09 18:26:45,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:26:45,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:45,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:26:45,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:26:45,983 INFO L87 Difference]: Start difference. First operand 38764 states and 160462 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:46,336 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-07-09 18:26:47,291 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-07-09 18:26:49,986 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-07-09 18:26:50,220 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-07-09 18:26:50,626 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-07-09 18:26:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:51,307 INFO L93 Difference]: Finished difference Result 74351 states and 301109 transitions. [2021-07-09 18:26:51,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:26:51,308 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:51,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:51,588 INFO L225 Difference]: With dead ends: 74351 [2021-07-09 18:26:51,588 INFO L226 Difference]: Without dead ends: 74179 [2021-07-09 18:26:51,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 4646.6ms TimeCoverageRelationStatistics Valid=1204, Invalid=4958, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:26:51,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74179 states. [2021-07-09 18:26:53,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74179 to 38810. [2021-07-09 18:26:53,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38810 states, 38809 states have (on average 4.139194516735809) internal successors, (160638), 38809 states have internal predecessors, (160638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:53,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38810 states to 38810 states and 160638 transitions. [2021-07-09 18:26:53,316 INFO L78 Accepts]: Start accepts. Automaton has 38810 states and 160638 transitions. Word has length 39 [2021-07-09 18:26:53,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:53,316 INFO L482 AbstractCegarLoop]: Abstraction has 38810 states and 160638 transitions. [2021-07-09 18:26:53,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:53,316 INFO L276 IsEmpty]: Start isEmpty. Operand 38810 states and 160638 transitions. [2021-07-09 18:26:53,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:53,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:53,405 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:53,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:53,622 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:53,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:53,622 INFO L82 PathProgramCache]: Analyzing trace with hash -737558007, now seen corresponding path program 55 times [2021-07-09 18:26:53,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:53,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969736435] [2021-07-09 18:26:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:53,887 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-07-09 18:26:54,226 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 18:26:54,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:54,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969736435] [2021-07-09 18:26:54,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969736435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:54,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424399075] [2021-07-09 18:26:54,226 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 18:26:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:54,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:26:54,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:54,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:26:54,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:54,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:54,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:54,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:26:54,474 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:26:54,474 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:26:54,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:54,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:54,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:54,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-09 18:26:54,534 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 18:26:54,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424399075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:54,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:54,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:26:54,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305518254] [2021-07-09 18:26:54,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:26:54,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:54,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:26:54,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:54,536 INFO L87 Difference]: Start difference. First operand 38810 states and 160638 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:56,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:56,503 INFO L93 Difference]: Finished difference Result 90479 states and 368460 transitions. [2021-07-09 18:26:56,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:26:56,503 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:26:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:56,860 INFO L225 Difference]: With dead ends: 90479 [2021-07-09 18:26:56,860 INFO L226 Difference]: Without dead ends: 90397 [2021-07-09 18:26:56,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1275.4ms TimeCoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:26:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90397 states. [2021-07-09 18:26:58,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90397 to 38948. [2021-07-09 18:26:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38948 states, 38947 states have (on average 4.1378796826456465) internal successors, (161158), 38947 states have internal predecessors, (161158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:58,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38948 states to 38948 states and 161158 transitions. [2021-07-09 18:26:58,499 INFO L78 Accepts]: Start accepts. Automaton has 38948 states and 161158 transitions. Word has length 39 [2021-07-09 18:26:58,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:58,499 INFO L482 AbstractCegarLoop]: Abstraction has 38948 states and 161158 transitions. [2021-07-09 18:26:58,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:58,499 INFO L276 IsEmpty]: Start isEmpty. Operand 38948 states and 161158 transitions. [2021-07-09 18:26:58,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:26:58,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:58,586 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:58,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:58,802 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:58,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:58,802 INFO L82 PathProgramCache]: Analyzing trace with hash -707566413, now seen corresponding path program 56 times [2021-07-09 18:26:58,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:58,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006140983] [2021-07-09 18:26:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:59,414 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 18:26:59,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:59,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006140983] [2021-07-09 18:26:59,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006140983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:59,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840034431] [2021-07-09 18:26:59,414 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 18:26:59,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:59,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:59,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:26:59,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:59,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:26:59,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:59,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:59,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:59,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:26:59,724 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:26:59,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:26:59,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:59,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:59,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:59,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:26:59,771 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 18:26:59,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840034431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:59,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:59,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:26:59,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291526061] [2021-07-09 18:26:59,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:26:59,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:59,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:26:59,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:59,772 INFO L87 Difference]: Start difference. First operand 38948 states and 161158 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:00,975 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-07-09 18:27:02,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:02,730 INFO L93 Difference]: Finished difference Result 111695 states and 453391 transitions. [2021-07-09 18:27:02,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:27:02,731 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:02,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:03,666 INFO L225 Difference]: With dead ends: 111695 [2021-07-09 18:27:03,666 INFO L226 Difference]: Without dead ends: 111575 [2021-07-09 18:27:03,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1965.1ms TimeCoverageRelationStatistics Valid=462, Invalid=2294, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:27:03,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111575 states. [2021-07-09 18:27:05,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111575 to 38320. [2021-07-09 18:27:05,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38320 states, 38319 states have (on average 4.140922257887732) internal successors, (158676), 38319 states have internal predecessors, (158676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38320 states to 38320 states and 158676 transitions. [2021-07-09 18:27:05,682 INFO L78 Accepts]: Start accepts. Automaton has 38320 states and 158676 transitions. Word has length 39 [2021-07-09 18:27:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:05,682 INFO L482 AbstractCegarLoop]: Abstraction has 38320 states and 158676 transitions. [2021-07-09 18:27:05,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 38320 states and 158676 transitions. [2021-07-09 18:27:05,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:05,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:05,769 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:05,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:05,985 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:05,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:05,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1646067281, now seen corresponding path program 57 times [2021-07-09 18:27:05,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:05,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349357068] [2021-07-09 18:27:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:06,274 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-07-09 18:27:06,586 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 18:27:06,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:06,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349357068] [2021-07-09 18:27:06,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349357068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:06,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454586354] [2021-07-09 18:27:06,587 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 18:27:06,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:27:06,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:06,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:27:06,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:06,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:06,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:06,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-09 18:27:06,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:06,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:06,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:06,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:87 [2021-07-09 18:27:07,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:07,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2021-07-09 18:27:07,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:07,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:07,113 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 1 xjuncts. [2021-07-09 18:27:07,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2021-07-09 18:27:07,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:07,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:27:07,180 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:07,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:07,201 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 18:27:07,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:47 [2021-07-09 18:27:07,375 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 18:27:07,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454586354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:07,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:07,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-09 18:27:07,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367152146] [2021-07-09 18:27:07,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:27:07,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:07,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:27:07,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:27:07,376 INFO L87 Difference]: Start difference. First operand 38320 states and 158676 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:13,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:13,259 INFO L93 Difference]: Finished difference Result 66215 states and 267753 transitions. [2021-07-09 18:27:13,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-09 18:27:13,259 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:13,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:13,536 INFO L225 Difference]: With dead ends: 66215 [2021-07-09 18:27:13,536 INFO L226 Difference]: Without dead ends: 66067 [2021-07-09 18:27:13,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2474 ImplicationChecksByTransitivity, 4696.6ms TimeCoverageRelationStatistics Valid=977, Invalid=6855, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:27:13,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66067 states. [2021-07-09 18:27:14,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66067 to 38912. [2021-07-09 18:27:14,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38912 states, 38911 states have (on average 4.136722263627252) internal successors, (160964), 38911 states have internal predecessors, (160964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:15,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38912 states to 38912 states and 160964 transitions. [2021-07-09 18:27:15,081 INFO L78 Accepts]: Start accepts. Automaton has 38912 states and 160964 transitions. Word has length 39 [2021-07-09 18:27:15,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:15,081 INFO L482 AbstractCegarLoop]: Abstraction has 38912 states and 160964 transitions. [2021-07-09 18:27:15,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:15,081 INFO L276 IsEmpty]: Start isEmpty. Operand 38912 states and 160964 transitions. [2021-07-09 18:27:15,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:15,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:15,168 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:15,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2021-07-09 18:27:15,384 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:15,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:15,384 INFO L82 PathProgramCache]: Analyzing trace with hash 967063105, now seen corresponding path program 58 times [2021-07-09 18:27:15,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:15,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690456966] [2021-07-09 18:27:15,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:15,700 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 18:27:15,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:15,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690456966] [2021-07-09 18:27:15,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690456966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:15,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217739611] [2021-07-09 18:27:15,701 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 18:27:15,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:27:15,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:15,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:27:15,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:15,937 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:27:15,937 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:27:15,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:15,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:15,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:15,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:27:16,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:27:16,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:16,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:27:16,203 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 18:27:16,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217739611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:16,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:16,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:27:16,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924750698] [2021-07-09 18:27:16,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:27:16,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:16,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:27:16,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:27:16,204 INFO L87 Difference]: Start difference. First operand 38912 states and 160964 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:18,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:18,509 INFO L93 Difference]: Finished difference Result 85324 states and 346778 transitions. [2021-07-09 18:27:18,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:27:18,509 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:18,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:19,231 INFO L225 Difference]: With dead ends: 85324 [2021-07-09 18:27:19,231 INFO L226 Difference]: Without dead ends: 85108 [2021-07-09 18:27:19,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1401.3ms TimeCoverageRelationStatistics Valid=439, Invalid=2423, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:27:19,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85108 states. [2021-07-09 18:27:20,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85108 to 38662. [2021-07-09 18:27:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38662 states, 38661 states have (on average 4.14127932541838) internal successors, (160106), 38661 states have internal predecessors, (160106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:20,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38662 states to 38662 states and 160106 transitions. [2021-07-09 18:27:20,987 INFO L78 Accepts]: Start accepts. Automaton has 38662 states and 160106 transitions. Word has length 39 [2021-07-09 18:27:20,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:20,987 INFO L482 AbstractCegarLoop]: Abstraction has 38662 states and 160106 transitions. [2021-07-09 18:27:20,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:20,987 INFO L276 IsEmpty]: Start isEmpty. Operand 38662 states and 160106 transitions. [2021-07-09 18:27:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:21,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:21,092 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:21,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:21,309 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:21,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:21,309 INFO L82 PathProgramCache]: Analyzing trace with hash 165788335, now seen corresponding path program 59 times [2021-07-09 18:27:21,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:21,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150398275] [2021-07-09 18:27:21,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:21,590 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 18:27:21,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:21,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150398275] [2021-07-09 18:27:21,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150398275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:21,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163299302] [2021-07-09 18:27:21,592 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 18:27:21,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:27:21,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:21,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:27:21,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:22,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:22,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:22,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:22,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:22,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-07-09 18:27:22,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:27:22,110 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.3 percent of original size [2021-07-09 18:27:22,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:22,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:40 [2021-07-09 18:27:22,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-09 18:27:22,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:22,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:22,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:22,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-07-09 18:27:22,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:22,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:22,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:22,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:22,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-07-09 18:27:22,258 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:22,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:22,266 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 18:27:22,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-07-09 18:27:22,314 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 18:27:22,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163299302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:22,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:22,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:27:22,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728409711] [2021-07-09 18:27:22,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:27:22,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:22,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:27:22,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:27:22,315 INFO L87 Difference]: Start difference. First operand 38662 states and 160106 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:23,491 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-07-09 18:27:25,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:25,383 INFO L93 Difference]: Finished difference Result 64664 states and 263109 transitions. [2021-07-09 18:27:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:27:25,383 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:25,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:25,690 INFO L225 Difference]: With dead ends: 64664 [2021-07-09 18:27:25,690 INFO L226 Difference]: Without dead ends: 64554 [2021-07-09 18:27:25,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 2094.9ms TimeCoverageRelationStatistics Valid=687, Invalid=4005, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:27:25,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64554 states. [2021-07-09 18:27:27,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64554 to 38976. [2021-07-09 18:27:27,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38976 states, 38975 states have (on average 4.139345734445157) internal successors, (161331), 38975 states have internal predecessors, (161331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38976 states to 38976 states and 161331 transitions. [2021-07-09 18:27:27,431 INFO L78 Accepts]: Start accepts. Automaton has 38976 states and 161331 transitions. Word has length 39 [2021-07-09 18:27:27,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:27,431 INFO L482 AbstractCegarLoop]: Abstraction has 38976 states and 161331 transitions. [2021-07-09 18:27:27,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 38976 states and 161331 transitions. [2021-07-09 18:27:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:27,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:27,530 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:27,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:27,746 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:27,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:27,747 INFO L82 PathProgramCache]: Analyzing trace with hash -560742591, now seen corresponding path program 60 times [2021-07-09 18:27:27,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:27,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795502229] [2021-07-09 18:27:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:28,144 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-09 18:27:28,445 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 18:27:28,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:28,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795502229] [2021-07-09 18:27:28,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795502229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:28,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559532753] [2021-07-09 18:27:28,445 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 18:27:28,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:27:28,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:28,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:27:28,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:28,637 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:27:28,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:27:28,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:28,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:28,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:28,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:24 [2021-07-09 18:27:28,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:27:28,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:28,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:28,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:28,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-09 18:27:28,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:28,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:27:28,718 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:28,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:28,725 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 18:27:28,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:27:28,761 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 18:27:28,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559532753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:28,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:28,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:27:28,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336011334] [2021-07-09 18:27:28,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:27:28,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:28,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:27:28,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:27:28,762 INFO L87 Difference]: Start difference. First operand 38976 states and 161331 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:31,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:31,513 INFO L93 Difference]: Finished difference Result 88281 states and 358606 transitions. [2021-07-09 18:27:31,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:27:31,514 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:31,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:31,908 INFO L225 Difference]: With dead ends: 88281 [2021-07-09 18:27:31,908 INFO L226 Difference]: Without dead ends: 88226 [2021-07-09 18:27:31,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1884.4ms TimeCoverageRelationStatistics Valid=526, Invalid=3014, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:27:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88226 states. [2021-07-09 18:27:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88226 to 38600. [2021-07-09 18:27:34,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38600 states, 38599 states have (on average 4.1400554418508255) internal successors, (159802), 38599 states have internal predecessors, (159802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:34,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38600 states to 38600 states and 159802 transitions. [2021-07-09 18:27:34,256 INFO L78 Accepts]: Start accepts. Automaton has 38600 states and 159802 transitions. Word has length 39 [2021-07-09 18:27:34,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:34,256 INFO L482 AbstractCegarLoop]: Abstraction has 38600 states and 159802 transitions. [2021-07-09 18:27:34,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:34,257 INFO L276 IsEmpty]: Start isEmpty. Operand 38600 states and 159802 transitions. [2021-07-09 18:27:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:34,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:34,368 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:34,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:34,585 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:34,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:34,585 INFO L82 PathProgramCache]: Analyzing trace with hash 807300523, now seen corresponding path program 61 times [2021-07-09 18:27:34,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:34,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283733811] [2021-07-09 18:27:34,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:34,976 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 18:27:34,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:34,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283733811] [2021-07-09 18:27:34,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283733811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:34,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46039224] [2021-07-09 18:27:34,977 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 18:27:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:35,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:27:35,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:35,295 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:27:35,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:27:35,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:35,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:35,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:35,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-09 18:27:35,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:27:35,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:35,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:35,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:35,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:27:35,395 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 18:27:35,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46039224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:35,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:35,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:27:35,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293153555] [2021-07-09 18:27:35,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:27:35,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:35,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:27:35,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:27:35,396 INFO L87 Difference]: Start difference. First operand 38600 states and 159802 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:37,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:37,576 INFO L93 Difference]: Finished difference Result 71434 states and 291667 transitions. [2021-07-09 18:27:37,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:27:37,576 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:37,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:37,851 INFO L225 Difference]: With dead ends: 71434 [2021-07-09 18:27:37,851 INFO L226 Difference]: Without dead ends: 71186 [2021-07-09 18:27:37,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1287.9ms TimeCoverageRelationStatistics Valid=352, Invalid=1628, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:27:38,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71186 states. [2021-07-09 18:27:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71186 to 38786. [2021-07-09 18:27:39,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38786 states, 38785 states have (on average 4.138249323191956) internal successors, (160502), 38785 states have internal predecessors, (160502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38786 states to 38786 states and 160502 transitions. [2021-07-09 18:27:39,433 INFO L78 Accepts]: Start accepts. Automaton has 38786 states and 160502 transitions. Word has length 39 [2021-07-09 18:27:39,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:39,433 INFO L482 AbstractCegarLoop]: Abstraction has 38786 states and 160502 transitions. [2021-07-09 18:27:39,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:39,433 INFO L276 IsEmpty]: Start isEmpty. Operand 38786 states and 160502 transitions. [2021-07-09 18:27:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:39,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:39,826 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:40,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-07-09 18:27:40,042 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:40,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:40,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1900909765, now seen corresponding path program 62 times [2021-07-09 18:27:40,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:40,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18165905] [2021-07-09 18:27:40,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:40,385 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 18:27:40,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:40,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18165905] [2021-07-09 18:27:40,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18165905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:40,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041643978] [2021-07-09 18:27:40,386 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 18:27:40,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:27:40,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:40,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:27:40,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:40,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:27:40,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:40,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:40,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:40,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:27:40,696 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:27:40,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:27:40,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:40,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:40,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:40,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:27:40,745 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 18:27:40,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041643978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:40,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:40,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:27:40,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349946692] [2021-07-09 18:27:40,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:27:40,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:40,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:27:40,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:27:40,746 INFO L87 Difference]: Start difference. First operand 38786 states and 160502 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:43,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:43,318 INFO L93 Difference]: Finished difference Result 88085 states and 358572 transitions. [2021-07-09 18:27:43,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:27:43,318 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:43,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:43,697 INFO L225 Difference]: With dead ends: 88085 [2021-07-09 18:27:43,697 INFO L226 Difference]: Without dead ends: 87917 [2021-07-09 18:27:43,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1262.4ms TimeCoverageRelationStatistics Valid=415, Invalid=2035, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:27:44,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87917 states. [2021-07-09 18:27:45,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87917 to 38764. [2021-07-09 18:27:45,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38764 states, 38763 states have (on average 4.1404174083533265) internal successors, (160495), 38763 states have internal predecessors, (160495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38764 states to 38764 states and 160495 transitions. [2021-07-09 18:27:45,656 INFO L78 Accepts]: Start accepts. Automaton has 38764 states and 160495 transitions. Word has length 39 [2021-07-09 18:27:45,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:45,656 INFO L482 AbstractCegarLoop]: Abstraction has 38764 states and 160495 transitions. [2021-07-09 18:27:45,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:45,657 INFO L276 IsEmpty]: Start isEmpty. Operand 38764 states and 160495 transitions. [2021-07-09 18:27:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:45,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:45,742 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:45,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:45,957 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:45,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:45,958 INFO L82 PathProgramCache]: Analyzing trace with hash 374060779, now seen corresponding path program 63 times [2021-07-09 18:27:45,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:45,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719279672] [2021-07-09 18:27:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:46,290 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 18:27:46,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:46,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719279672] [2021-07-09 18:27:46,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719279672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:46,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366244353] [2021-07-09 18:27:46,290 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 18:27:46,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:27:46,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:46,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:27:46,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:46,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:46,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 55 [2021-07-09 18:27:46,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:46,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:46,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:27:46,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:146 [2021-07-09 18:27:47,023 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-07-09 18:27:47,158 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-09 18:27:47,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:27:47,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:47,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-07-09 18:27:47,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,214 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-09 18:27:47,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:27:47,216 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:47,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-07-09 18:27:47,229 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 18:27:47,242 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:27:47,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:27:47,243 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,258 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:27:47,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 1 [2021-07-09 18:27:47,259 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,286 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-09 18:27:47,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2021-07-09 18:27:47,288 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:47,299 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:27:47,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 30 [2021-07-09 18:27:47,301 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,333 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-09 18:27:47,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 53 [2021-07-09 18:27:47,335 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,348 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:27:47,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-07-09 18:27:47,349 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,363 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-09 18:27:47,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 1 [2021-07-09 18:27:47,364 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,373 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:27:47,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:27:47,375 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:47,562 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-09 18:27:47,563 INFO L628 ElimStorePlain]: treesize reduction 119, result has 71.3 percent of original size [2021-07-09 18:27:47,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 18:27:47,574 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 3 variables, input treesize:723, output treesize:201 [2021-07-09 18:27:47,735 INFO L446 ElimStorePlain]: Different costs {1=[q1, v_prenex_13, v_prenex_12, v_prenex_15], 3=[v_prenex_14]} [2021-07-09 18:27:47,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:47,745 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:27:47,747 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:47,935 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-07-09 18:27:47,936 INFO L628 ElimStorePlain]: treesize reduction 19, result has 93.0 percent of original size [2021-07-09 18:27:47,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:47,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:27:47,948 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:48,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:48,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:48,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 18:27:48,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:48,214 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-07-09 18:27:48,214 INFO L628 ElimStorePlain]: treesize reduction 48, result has 80.0 percent of original size [2021-07-09 18:27:48,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:48,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:27:48,228 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:48,449 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-07-09 18:27:48,449 INFO L628 ElimStorePlain]: treesize reduction 26, result has 86.4 percent of original size [2021-07-09 18:27:48,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:48,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:48,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-07-09 18:27:48,467 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-09 18:27:48,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:48,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 18:27:48,472 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:48,567 INFO L628 ElimStorePlain]: treesize reduction 34, result has 77.2 percent of original size [2021-07-09 18:27:48,570 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 18:27:48,570 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:272, output treesize:111 [2021-07-09 18:27:48,787 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 18:27:48,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366244353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:48,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:48,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-07-09 18:27:48,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028331698] [2021-07-09 18:27:48,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:27:48,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:48,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:27:48,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:27:48,788 INFO L87 Difference]: Start difference. First operand 38764 states and 160495 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:51,041 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 66 [2021-07-09 18:27:51,473 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-07-09 18:27:51,676 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-07-09 18:27:52,131 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2021-07-09 18:27:52,371 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-07-09 18:27:52,609 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 69 [2021-07-09 18:27:52,857 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2021-07-09 18:27:53,426 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2021-07-09 18:27:53,742 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-07-09 18:27:54,602 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-07-09 18:27:55,294 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-07-09 18:27:55,885 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2021-07-09 18:27:56,224 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 86 [2021-07-09 18:27:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:57,365 INFO L93 Difference]: Finished difference Result 74404 states and 301069 transitions. [2021-07-09 18:27:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-09 18:27:57,365 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:27:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:57,768 INFO L225 Difference]: With dead ends: 74404 [2021-07-09 18:27:57,769 INFO L226 Difference]: Without dead ends: 74256 [2021-07-09 18:27:57,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3203 ImplicationChecksByTransitivity, 7092.5ms TimeCoverageRelationStatistics Valid=1652, Invalid=8248, Unknown=0, NotChecked=0, Total=9900 [2021-07-09 18:27:57,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74256 states. [2021-07-09 18:27:59,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74256 to 38786. [2021-07-09 18:27:59,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38786 states, 38785 states have (on average 4.140234626788707) internal successors, (160579), 38785 states have internal predecessors, (160579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:59,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38786 states to 38786 states and 160579 transitions. [2021-07-09 18:27:59,700 INFO L78 Accepts]: Start accepts. Automaton has 38786 states and 160579 transitions. Word has length 39 [2021-07-09 18:27:59,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:59,700 INFO L482 AbstractCegarLoop]: Abstraction has 38786 states and 160579 transitions. [2021-07-09 18:27:59,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:59,700 INFO L276 IsEmpty]: Start isEmpty. Operand 38786 states and 160579 transitions. [2021-07-09 18:27:59,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:27:59,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:59,803 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:00,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:00,020 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:00,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:00,020 INFO L82 PathProgramCache]: Analyzing trace with hash -103766079, now seen corresponding path program 64 times [2021-07-09 18:28:00,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:00,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369936651] [2021-07-09 18:28:00,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:00,602 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 18:28:00,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:00,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369936651] [2021-07-09 18:28:00,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369936651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:00,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338933640] [2021-07-09 18:28:00,603 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 18:28:00,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:28:00,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:00,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:28:00,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:00,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:28:00,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:00,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:00,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:00,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:28:00,939 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:28:00,940 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:28:00,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:00,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:00,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:00,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:28:00,990 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 18:28:00,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338933640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:00,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:00,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:28:00,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318842401] [2021-07-09 18:28:00,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:28:00,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:00,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:28:00,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:28:00,991 INFO L87 Difference]: Start difference. First operand 38786 states and 160579 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:03,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:03,831 INFO L93 Difference]: Finished difference Result 87653 states and 356978 transitions. [2021-07-09 18:28:03,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:28:03,831 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:03,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:04,357 INFO L225 Difference]: With dead ends: 87653 [2021-07-09 18:28:04,357 INFO L226 Difference]: Without dead ends: 87571 [2021-07-09 18:28:04,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1591.1ms TimeCoverageRelationStatistics Valid=411, Invalid=2241, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:28:04,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87571 states. [2021-07-09 18:28:06,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87571 to 38508. [2021-07-09 18:28:06,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38508 states, 38507 states have (on average 4.141454800425897) internal successors, (159475), 38507 states have internal predecessors, (159475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38508 states to 38508 states and 159475 transitions. [2021-07-09 18:28:06,476 INFO L78 Accepts]: Start accepts. Automaton has 38508 states and 159475 transitions. Word has length 39 [2021-07-09 18:28:06,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:06,476 INFO L482 AbstractCegarLoop]: Abstraction has 38508 states and 159475 transitions. [2021-07-09 18:28:06,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:06,476 INFO L276 IsEmpty]: Start isEmpty. Operand 38508 states and 159475 transitions. [2021-07-09 18:28:06,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:28:06,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:06,872 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:07,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-07-09 18:28:07,100 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:07,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:07,100 INFO L82 PathProgramCache]: Analyzing trace with hash -335385293, now seen corresponding path program 65 times [2021-07-09 18:28:07,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:07,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860802461] [2021-07-09 18:28:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:07,433 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 18:28:07,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:07,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860802461] [2021-07-09 18:28:07,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860802461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:07,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796453984] [2021-07-09 18:28:07,434 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 18:28:07,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:28:07,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:07,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:28:07,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:07,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:07,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:07,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:28:07,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:07,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:07,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:28:07,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:108 [2021-07-09 18:28:07,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:07,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2021-07-09 18:28:07,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:28:07,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:07,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 52 [2021-07-09 18:28:07,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:07,999 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-09 18:28:07,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 42 [2021-07-09 18:28:08,001 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:08,009 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 18:28:08,009 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-07-09 18:28:08,010 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:08,111 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-07-09 18:28:08,112 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.3 percent of original size [2021-07-09 18:28:08,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:28:08,123 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:173, output treesize:99 [2021-07-09 18:28:08,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:08,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:08,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:08,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:08,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-07-09 18:28:08,283 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:08,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:08,291 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 18:28:08,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-07-09 18:28:08,344 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 18:28:08,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796453984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:08,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:08,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:28:08,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108647098] [2021-07-09 18:28:08,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:28:08,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:08,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:28:08,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:28:08,345 INFO L87 Difference]: Start difference. First operand 38508 states and 159475 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:13,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:13,796 INFO L93 Difference]: Finished difference Result 76510 states and 312073 transitions. [2021-07-09 18:28:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 18:28:13,796 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:13,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:14,151 INFO L225 Difference]: With dead ends: 76510 [2021-07-09 18:28:14,152 INFO L226 Difference]: Without dead ends: 76400 [2021-07-09 18:28:14,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 3317.6ms TimeCoverageRelationStatistics Valid=947, Invalid=6363, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:28:14,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76400 states. [2021-07-09 18:28:15,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76400 to 39033. [2021-07-09 18:28:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39033 states, 39032 states have (on average 4.140525722484115) internal successors, (161613), 39032 states have internal predecessors, (161613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39033 states to 39033 states and 161613 transitions. [2021-07-09 18:28:16,029 INFO L78 Accepts]: Start accepts. Automaton has 39033 states and 161613 transitions. Word has length 39 [2021-07-09 18:28:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:16,029 INFO L482 AbstractCegarLoop]: Abstraction has 39033 states and 161613 transitions. [2021-07-09 18:28:16,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 39033 states and 161613 transitions. [2021-07-09 18:28:16,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:28:16,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:16,140 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:16,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-07-09 18:28:16,353 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:16,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:16,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1178071479, now seen corresponding path program 66 times [2021-07-09 18:28:16,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:16,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928227039] [2021-07-09 18:28:16,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:17,008 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 18:28:17,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:17,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928227039] [2021-07-09 18:28:17,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928227039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:17,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311870196] [2021-07-09 18:28:17,008 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 18:28:17,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:28:17,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:17,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 18:28:17,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:17,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:28:17,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:17,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:17,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:17,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:28:17,273 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:28:17,274 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:28:17,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:17,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:17,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:17,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-09 18:28:17,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:17,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:28:17,334 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:17,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:17,342 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 18:28:17,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:28:17,394 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 18:28:17,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311870196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:17,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:17,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:28:17,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624941050] [2021-07-09 18:28:17,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:28:17,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:17,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:28:17,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:28:17,405 INFO L87 Difference]: Start difference. First operand 39033 states and 161613 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:20,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:20,700 INFO L93 Difference]: Finished difference Result 98553 states and 401234 transitions. [2021-07-09 18:28:20,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:28:20,701 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:20,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:21,499 INFO L225 Difference]: With dead ends: 98553 [2021-07-09 18:28:21,499 INFO L226 Difference]: Without dead ends: 98498 [2021-07-09 18:28:21,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 2100.7ms TimeCoverageRelationStatistics Valid=686, Invalid=3604, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:28:21,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98498 states. [2021-07-09 18:28:23,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98498 to 38951. [2021-07-09 18:28:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38951 states, 38950 states have (on average 4.142028241335045) internal successors, (161332), 38950 states have internal predecessors, (161332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:23,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38951 states to 38951 states and 161332 transitions. [2021-07-09 18:28:23,576 INFO L78 Accepts]: Start accepts. Automaton has 38951 states and 161332 transitions. Word has length 39 [2021-07-09 18:28:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:23,576 INFO L482 AbstractCegarLoop]: Abstraction has 38951 states and 161332 transitions. [2021-07-09 18:28:23,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 38951 states and 161332 transitions. [2021-07-09 18:28:23,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:28:23,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:23,684 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:23,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:23,896 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:23,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:23,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1021356079, now seen corresponding path program 67 times [2021-07-09 18:28:23,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:23,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822967326] [2021-07-09 18:28:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:24,438 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 18:28:24,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:24,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822967326] [2021-07-09 18:28:24,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822967326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:24,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766197019] [2021-07-09 18:28:24,439 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 18:28:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:24,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:28:24,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:24,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:28:24,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:24,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:24,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:24,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:28:24,694 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:28:24,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:28:24,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:24,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:24,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:24,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:28:24,741 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 18:28:24,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766197019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:24,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:24,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:28:24,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687665898] [2021-07-09 18:28:24,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:28:24,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:24,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:28:24,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:28:24,743 INFO L87 Difference]: Start difference. First operand 38951 states and 161332 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:26,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:26,483 INFO L93 Difference]: Finished difference Result 80550 states and 330912 transitions. [2021-07-09 18:28:26,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:28:26,484 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:26,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:27,089 INFO L225 Difference]: With dead ends: 80550 [2021-07-09 18:28:27,089 INFO L226 Difference]: Without dead ends: 80495 [2021-07-09 18:28:27,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1101.3ms TimeCoverageRelationStatistics Valid=337, Invalid=1469, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:28:27,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80495 states. [2021-07-09 18:28:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80495 to 39901. [2021-07-09 18:28:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39901 states, 39900 states have (on average 4.144611528822055) internal successors, (165370), 39900 states have internal predecessors, (165370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:28,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39901 states to 39901 states and 165370 transitions. [2021-07-09 18:28:28,942 INFO L78 Accepts]: Start accepts. Automaton has 39901 states and 165370 transitions. Word has length 39 [2021-07-09 18:28:28,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:28,942 INFO L482 AbstractCegarLoop]: Abstraction has 39901 states and 165370 transitions. [2021-07-09 18:28:28,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand 39901 states and 165370 transitions. [2021-07-09 18:28:29,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:28:29,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:29,038 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:29,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:29,253 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:29,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:29,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1784259093, now seen corresponding path program 68 times [2021-07-09 18:28:29,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:29,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30705187] [2021-07-09 18:28:29,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:29,533 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 18:28:29,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:29,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30705187] [2021-07-09 18:28:29,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30705187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:29,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936731826] [2021-07-09 18:28:29,533 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 18:28:29,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:28:29,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:29,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:28:29,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:29,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:28:29,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:29,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:29,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:29,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:28:29,823 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:28:29,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:28:29,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:29,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:29,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:29,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:28:30,148 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 18:28:30,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936731826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:30,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:30,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:28:30,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019183537] [2021-07-09 18:28:30,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:28:30,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:30,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:28:30,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:28:30,149 INFO L87 Difference]: Start difference. First operand 39901 states and 165370 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:32,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:32,258 INFO L93 Difference]: Finished difference Result 77926 states and 319907 transitions. [2021-07-09 18:28:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:28:32,258 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:32,940 INFO L225 Difference]: With dead ends: 77926 [2021-07-09 18:28:32,940 INFO L226 Difference]: Without dead ends: 77871 [2021-07-09 18:28:32,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1219.2ms TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:28:33,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77871 states. [2021-07-09 18:28:34,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77871 to 39485. [2021-07-09 18:28:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39485 states, 39484 states have (on average 4.144666193901327) internal successors, (163648), 39484 states have internal predecessors, (163648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:34,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39485 states to 39485 states and 163648 transitions. [2021-07-09 18:28:34,903 INFO L78 Accepts]: Start accepts. Automaton has 39485 states and 163648 transitions. Word has length 39 [2021-07-09 18:28:34,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:34,904 INFO L482 AbstractCegarLoop]: Abstraction has 39485 states and 163648 transitions. [2021-07-09 18:28:34,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:34,904 INFO L276 IsEmpty]: Start isEmpty. Operand 39485 states and 163648 transitions. [2021-07-09 18:28:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:28:35,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:35,015 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:35,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:35,232 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash -829473297, now seen corresponding path program 69 times [2021-07-09 18:28:35,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:35,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486484250] [2021-07-09 18:28:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:35,629 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 18:28:35,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:35,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486484250] [2021-07-09 18:28:35,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486484250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:35,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513573681] [2021-07-09 18:28:35,629 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 18:28:35,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:28:35,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:35,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 18:28:35,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:35,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:35,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:35,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-07-09 18:28:35,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:35,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:35,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:35,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:106 [2021-07-09 18:28:36,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:36,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-07-09 18:28:36,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:36,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:36,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:36,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:40 [2021-07-09 18:28:36,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:36,429 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:28:36,430 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:36,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:36,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 18:28:36,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:36,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:36,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:36,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2021-07-09 18:28:36,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:36,483 INFO L628 ElimStorePlain]: treesize reduction 46, result has 50.0 percent of original size [2021-07-09 18:28:36,485 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 18:28:36,485 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:123, output treesize:47 [2021-07-09 18:28:36,632 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 18:28:36,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513573681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:36,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:36,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-09 18:28:36,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836368330] [2021-07-09 18:28:36,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:28:36,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:36,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:28:36,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:28:36,633 INFO L87 Difference]: Start difference. First operand 39485 states and 163648 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:41,538 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-07-09 18:28:42,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:42,496 INFO L93 Difference]: Finished difference Result 65504 states and 265768 transitions. [2021-07-09 18:28:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-09 18:28:42,496 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:43,069 INFO L225 Difference]: With dead ends: 65504 [2021-07-09 18:28:43,070 INFO L226 Difference]: Without dead ends: 65356 [2021-07-09 18:28:43,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 4654.5ms TimeCoverageRelationStatistics Valid=1000, Invalid=6832, Unknown=0, NotChecked=0, Total=7832 [2021-07-09 18:28:43,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65356 states. [2021-07-09 18:28:44,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65356 to 39869. [2021-07-09 18:28:44,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39869 states, 39868 states have (on average 4.140614026286746) internal successors, (165078), 39868 states have internal predecessors, (165078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:44,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39869 states to 39869 states and 165078 transitions. [2021-07-09 18:28:44,525 INFO L78 Accepts]: Start accepts. Automaton has 39869 states and 165078 transitions. Word has length 39 [2021-07-09 18:28:44,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:44,526 INFO L482 AbstractCegarLoop]: Abstraction has 39869 states and 165078 transitions. [2021-07-09 18:28:44,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:44,526 INFO L276 IsEmpty]: Start isEmpty. Operand 39869 states and 165078 transitions. [2021-07-09 18:28:44,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:28:44,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:44,617 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:44,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-07-09 18:28:44,833 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:44,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:44,834 INFO L82 PathProgramCache]: Analyzing trace with hash 920414259, now seen corresponding path program 70 times [2021-07-09 18:28:44,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:44,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43090347] [2021-07-09 18:28:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:45,375 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 18:28:45,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:45,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43090347] [2021-07-09 18:28:45,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43090347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:45,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539141045] [2021-07-09 18:28:45,376 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 18:28:45,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:28:45,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:45,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:28:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:45,642 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:28:45,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:28:45,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:45,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:45,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:45,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-09 18:28:45,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:28:45,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:45,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:45,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:45,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:28:45,726 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 18:28:45,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539141045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:45,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:45,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:28:45,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729908939] [2021-07-09 18:28:45,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:28:45,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:45,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:28:45,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:28:45,728 INFO L87 Difference]: Start difference. First operand 39869 states and 165078 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:46,203 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-07-09 18:28:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:49,035 INFO L93 Difference]: Finished difference Result 86144 states and 349998 transitions. [2021-07-09 18:28:49,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:28:49,035 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:49,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:49,402 INFO L225 Difference]: With dead ends: 86144 [2021-07-09 18:28:49,402 INFO L226 Difference]: Without dead ends: 85920 [2021-07-09 18:28:49,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1829.0ms TimeCoverageRelationStatistics Valid=478, Invalid=2714, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:28:49,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85920 states. [2021-07-09 18:28:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85920 to 39648. [2021-07-09 18:28:51,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39648 states, 39647 states have (on average 4.144626327338765) internal successors, (164322), 39647 states have internal predecessors, (164322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39648 states to 39648 states and 164322 transitions. [2021-07-09 18:28:51,331 INFO L78 Accepts]: Start accepts. Automaton has 39648 states and 164322 transitions. Word has length 39 [2021-07-09 18:28:51,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:51,331 INFO L482 AbstractCegarLoop]: Abstraction has 39648 states and 164322 transitions. [2021-07-09 18:28:51,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 39648 states and 164322 transitions. [2021-07-09 18:28:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:28:51,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:51,421 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:51,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-07-09 18:28:51,637 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:51,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1466633787, now seen corresponding path program 71 times [2021-07-09 18:28:51,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:51,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597075717] [2021-07-09 18:28:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:52,285 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2021-07-09 18:28:52,446 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 18:28:52,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:52,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597075717] [2021-07-09 18:28:52,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597075717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:52,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637264968] [2021-07-09 18:28:52,446 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 18:28:52,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:28:52,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:52,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:28:52,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:52,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:28:52,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:52,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:52,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-09 18:28:52,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:43 [2021-07-09 18:28:52,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:52,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 51 [2021-07-09 18:28:52,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:52,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:52,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:28:52,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:28 [2021-07-09 18:28:52,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:52,974 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-07-09 18:28:52,975 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:52,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:52,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:52,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-07-09 18:28:53,055 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 18:28:53,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637264968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:53,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:53,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:28:53,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203013739] [2021-07-09 18:28:53,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:28:53,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:53,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:28:53,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:28:53,057 INFO L87 Difference]: Start difference. First operand 39648 states and 164322 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:59,387 INFO L93 Difference]: Finished difference Result 112657 states and 457618 transitions. [2021-07-09 18:28:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-09 18:28:59,387 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:28:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:59,872 INFO L225 Difference]: With dead ends: 112657 [2021-07-09 18:28:59,872 INFO L226 Difference]: Without dead ends: 112250 [2021-07-09 18:28:59,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2616 ImplicationChecksByTransitivity, 3550.7ms TimeCoverageRelationStatistics Valid=1144, Invalid=7228, Unknown=0, NotChecked=0, Total=8372 [2021-07-09 18:29:00,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112250 states. [2021-07-09 18:29:01,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112250 to 40068. [2021-07-09 18:29:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40068 states, 40067 states have (on average 4.142186837047944) internal successors, (165965), 40067 states have internal predecessors, (165965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:02,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40068 states to 40068 states and 165965 transitions. [2021-07-09 18:29:02,002 INFO L78 Accepts]: Start accepts. Automaton has 40068 states and 165965 transitions. Word has length 39 [2021-07-09 18:29:02,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:02,002 INFO L482 AbstractCegarLoop]: Abstraction has 40068 states and 165965 transitions. [2021-07-09 18:29:02,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:02,003 INFO L276 IsEmpty]: Start isEmpty. Operand 40068 states and 165965 transitions. [2021-07-09 18:29:02,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:02,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:02,090 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:02,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-07-09 18:29:02,306 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:02,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:02,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1262713041, now seen corresponding path program 72 times [2021-07-09 18:29:02,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:02,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410811822] [2021-07-09 18:29:02,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:03,028 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 18:29:03,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:03,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410811822] [2021-07-09 18:29:03,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410811822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:03,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67896680] [2021-07-09 18:29:03,028 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 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 18:29:03,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:29:03,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:03,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:29:03,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:03,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:03,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:03,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-07-09 18:29:03,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:03,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:03,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:03,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:39 [2021-07-09 18:29:03,369 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:29:03,369 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:29:03,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:03,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:03,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:03,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:11 [2021-07-09 18:29:03,447 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 18:29:03,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67896680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:03,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:03,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:29:03,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241701894] [2021-07-09 18:29:03,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:29:03,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:03,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:29:03,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:29:03,448 INFO L87 Difference]: Start difference. First operand 40068 states and 165965 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:04,778 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-07-09 18:29:05,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:05,518 INFO L93 Difference]: Finished difference Result 71486 states and 291440 transitions. [2021-07-09 18:29:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:29:05,518 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:29:05,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:06,149 INFO L225 Difference]: With dead ends: 71486 [2021-07-09 18:29:06,149 INFO L226 Difference]: Without dead ends: 71337 [2021-07-09 18:29:06,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1763.7ms TimeCoverageRelationStatistics Valid=375, Invalid=1787, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:29:06,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71337 states. [2021-07-09 18:29:07,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71337 to 40290. [2021-07-09 18:29:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40290 states, 40289 states have (on average 4.141949415473206) internal successors, (166875), 40289 states have internal predecessors, (166875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40290 states to 40290 states and 166875 transitions. [2021-07-09 18:29:07,914 INFO L78 Accepts]: Start accepts. Automaton has 40290 states and 166875 transitions. Word has length 39 [2021-07-09 18:29:07,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:07,914 INFO L482 AbstractCegarLoop]: Abstraction has 40290 states and 166875 transitions. [2021-07-09 18:29:07,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:07,914 INFO L276 IsEmpty]: Start isEmpty. Operand 40290 states and 166875 transitions. [2021-07-09 18:29:08,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:08,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:08,021 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:08,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:08,238 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:08,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:08,238 INFO L82 PathProgramCache]: Analyzing trace with hash -991443623, now seen corresponding path program 73 times [2021-07-09 18:29:08,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:08,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193476380] [2021-07-09 18:29:08,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:08,577 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 18:29:08,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:08,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193476380] [2021-07-09 18:29:08,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193476380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:08,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287294132] [2021-07-09 18:29:08,578 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 18:29:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:08,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:29:08,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:08,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:29:08,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:08,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:08,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:08,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:29:08,896 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:29:08,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:29:08,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:08,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:08,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:08,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:29:08,945 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 18:29:08,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287294132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:08,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:08,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-07-09 18:29:08,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398007835] [2021-07-09 18:29:08,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:29:08,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:08,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:29:08,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:29:08,946 INFO L87 Difference]: Start difference. First operand 40290 states and 166875 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:09,210 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-07-09 18:29:11,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:11,464 INFO L93 Difference]: Finished difference Result 74908 states and 306273 transitions. [2021-07-09 18:29:11,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:29:11,465 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:29:11,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:12,074 INFO L225 Difference]: With dead ends: 74908 [2021-07-09 18:29:12,074 INFO L226 Difference]: Without dead ends: 74834 [2021-07-09 18:29:12,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1405.3ms TimeCoverageRelationStatistics Valid=322, Invalid=1748, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:29:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74834 states. [2021-07-09 18:29:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74834 to 40210. [2021-07-09 18:29:13,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40210 states, 40209 states have (on average 4.1430774204780025) internal successors, (166589), 40209 states have internal predecessors, (166589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40210 states to 40210 states and 166589 transitions. [2021-07-09 18:29:13,670 INFO L78 Accepts]: Start accepts. Automaton has 40210 states and 166589 transitions. Word has length 39 [2021-07-09 18:29:13,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:13,670 INFO L482 AbstractCegarLoop]: Abstraction has 40210 states and 166589 transitions. [2021-07-09 18:29:13,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:13,670 INFO L276 IsEmpty]: Start isEmpty. Operand 40210 states and 166589 transitions. [2021-07-09 18:29:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:13,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:13,763 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:13,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-07-09 18:29:13,977 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:13,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1434492331, now seen corresponding path program 74 times [2021-07-09 18:29:13,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:13,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297495491] [2021-07-09 18:29:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:14,285 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 18:29:14,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:14,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297495491] [2021-07-09 18:29:14,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297495491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:14,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066324243] [2021-07-09 18:29:14,285 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 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 18:29:14,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:29:14,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:14,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:29:14,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:14,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:29:14,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:14,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:14,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:14,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:29:14,553 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:29:14,553 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:29:14,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:14,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:14,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:14,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:29:14,595 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 18:29:14,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066324243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:14,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:14,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:29:14,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17338520] [2021-07-09 18:29:14,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:29:14,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:14,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:29:14,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:29:14,596 INFO L87 Difference]: Start difference. First operand 40210 states and 166589 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:17,763 INFO L93 Difference]: Finished difference Result 104360 states and 423551 transitions. [2021-07-09 18:29:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:29:17,763 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:29:17,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:18,214 INFO L225 Difference]: With dead ends: 104360 [2021-07-09 18:29:18,214 INFO L226 Difference]: Without dead ends: 104240 [2021-07-09 18:29:18,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1690.0ms TimeCoverageRelationStatistics Valid=586, Invalid=3074, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:29:18,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104240 states. [2021-07-09 18:29:20,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104240 to 39614. [2021-07-09 18:29:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39614 states, 39613 states have (on average 4.146971953651579) internal successors, (164274), 39613 states have internal predecessors, (164274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39614 states to 39614 states and 164274 transitions. [2021-07-09 18:29:20,706 INFO L78 Accepts]: Start accepts. Automaton has 39614 states and 164274 transitions. Word has length 39 [2021-07-09 18:29:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:20,706 INFO L482 AbstractCegarLoop]: Abstraction has 39614 states and 164274 transitions. [2021-07-09 18:29:20,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 39614 states and 164274 transitions. [2021-07-09 18:29:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:20,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:20,796 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:21,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-07-09 18:29:21,013 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:21,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:21,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1895467137, now seen corresponding path program 75 times [2021-07-09 18:29:21,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:21,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944139147] [2021-07-09 18:29:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:21,323 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 18:29:21,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:21,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944139147] [2021-07-09 18:29:21,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944139147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:21,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062603053] [2021-07-09 18:29:21,324 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 18:29:21,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:29:21,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:21,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:29:21,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:21,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:21,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-07-09 18:29:21,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:21,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:21,850 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 1 xjuncts. [2021-07-09 18:29:21,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:61 [2021-07-09 18:29:22,151 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_20, v_prenex_18], 3=[q1]} [2021-07-09 18:29:22,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:22,162 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-07-09 18:29:22,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:29:22,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:22,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:22,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-07-09 18:29:22,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:29:22,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:22,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:22,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:22,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-07-09 18:29:22,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:22,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:22,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-07-09 18:29:22,372 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:168, output treesize:166 [2021-07-09 18:29:22,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:22,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:29:22,559 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:22,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:22,576 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 18:29:22,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:45 [2021-07-09 18:29:22,668 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 18:29:22,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062603053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:22,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:22,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-09 18:29:22,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550329033] [2021-07-09 18:29:22,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:29:22,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:22,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:29:22,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:29:22,669 INFO L87 Difference]: Start difference. First operand 39614 states and 164274 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:24,849 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-07-09 18:29:25,807 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2021-07-09 18:29:28,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:28,322 INFO L93 Difference]: Finished difference Result 80724 states and 325313 transitions. [2021-07-09 18:29:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-09 18:29:28,322 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:29:28,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:28,650 INFO L225 Difference]: With dead ends: 80724 [2021-07-09 18:29:28,651 INFO L226 Difference]: Without dead ends: 80450 [2021-07-09 18:29:28,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2507 ImplicationChecksByTransitivity, 4404.9ms TimeCoverageRelationStatistics Valid=1241, Invalid=6769, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:29:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80450 states. [2021-07-09 18:29:30,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80450 to 39763. [2021-07-09 18:29:30,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39763 states, 39762 states have (on average 4.144761329912982) internal successors, (164804), 39762 states have internal predecessors, (164804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:30,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39763 states to 39763 states and 164804 transitions. [2021-07-09 18:29:30,461 INFO L78 Accepts]: Start accepts. Automaton has 39763 states and 164804 transitions. Word has length 39 [2021-07-09 18:29:30,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:30,462 INFO L482 AbstractCegarLoop]: Abstraction has 39763 states and 164804 transitions. [2021-07-09 18:29:30,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 39763 states and 164804 transitions. [2021-07-09 18:29:30,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:30,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:30,921 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:31,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-09 18:29:31,137 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:31,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1621561025, now seen corresponding path program 76 times [2021-07-09 18:29:31,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:31,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002614395] [2021-07-09 18:29:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:31,438 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 18:29:31,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:31,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002614395] [2021-07-09 18:29:31,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002614395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:31,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667467004] [2021-07-09 18:29:31,438 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 18:29:31,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:29:31,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:31,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:29:31,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:31,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:29:31,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:31,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:31,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:31,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:29:31,735 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:29:31,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:29:31,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:31,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:31,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:31,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:29:31,781 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 18:29:31,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667467004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:31,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:31,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:29:31,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347787061] [2021-07-09 18:29:31,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:29:31,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:31,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:29:31,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:29:31,782 INFO L87 Difference]: Start difference. First operand 39763 states and 164804 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:32,650 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-07-09 18:29:34,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:34,377 INFO L93 Difference]: Finished difference Result 94767 states and 386325 transitions. [2021-07-09 18:29:34,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:29:34,378 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:29:34,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:34,764 INFO L225 Difference]: With dead ends: 94767 [2021-07-09 18:29:34,764 INFO L226 Difference]: Without dead ends: 94685 [2021-07-09 18:29:34,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1500.2ms TimeCoverageRelationStatistics Valid=409, Invalid=2041, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:29:35,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94685 states. [2021-07-09 18:29:36,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94685 to 39969. [2021-07-09 18:29:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39969 states, 39968 states have (on average 4.144115292233787) internal successors, (165632), 39968 states have internal predecessors, (165632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:37,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39969 states to 39969 states and 165632 transitions. [2021-07-09 18:29:37,380 INFO L78 Accepts]: Start accepts. Automaton has 39969 states and 165632 transitions. Word has length 39 [2021-07-09 18:29:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:37,381 INFO L482 AbstractCegarLoop]: Abstraction has 39969 states and 165632 transitions. [2021-07-09 18:29:37,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 39969 states and 165632 transitions. [2021-07-09 18:29:37,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:37,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:37,492 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:37,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:37,705 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:37,705 INFO L82 PathProgramCache]: Analyzing trace with hash -32263573, now seen corresponding path program 77 times [2021-07-09 18:29:37,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:37,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537124758] [2021-07-09 18:29:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:38,065 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 18:29:38,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:38,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537124758] [2021-07-09 18:29:38,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537124758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:38,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822952840] [2021-07-09 18:29:38,065 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 18:29:38,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:29:38,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:38,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:29:38,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:38,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:38,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:29:38,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:38,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:38,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:29:38,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:68 [2021-07-09 18:29:38,949 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_28], 6=[q1, v_prenex_26]} [2021-07-09 18:29:38,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:38,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:38,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2021-07-09 18:29:38,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:39,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:39,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:39,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:39,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:39,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:39,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2021-07-09 18:29:39,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:29:39,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:39,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:39,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:39,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:39,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:39,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-07-09 18:29:39,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 18:29:39,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:39,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-09 18:29:39,159 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:181, output treesize:84 [2021-07-09 18:29:39,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:39,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-07-09 18:29:39,284 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:39,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:39,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:39,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:11 [2021-07-09 18:29:39,369 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 18:29:39,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822952840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:39,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:39,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:29:39,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954452111] [2021-07-09 18:29:39,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:29:39,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:39,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:29:39,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:29:39,371 INFO L87 Difference]: Start difference. First operand 39969 states and 165632 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:40,453 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2021-07-09 18:29:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:46,876 INFO L93 Difference]: Finished difference Result 111989 states and 453363 transitions. [2021-07-09 18:29:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-09 18:29:46,877 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:29:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:47,615 INFO L225 Difference]: With dead ends: 111989 [2021-07-09 18:29:47,615 INFO L226 Difference]: Without dead ends: 111570 [2021-07-09 18:29:47,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 4995.9ms TimeCoverageRelationStatistics Valid=1232, Invalid=8080, Unknown=0, NotChecked=0, Total=9312 [2021-07-09 18:29:47,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111570 states. [2021-07-09 18:29:49,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111570 to 40153. [2021-07-09 18:29:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40153 states, 40152 states have (on average 4.142757521418609) internal successors, (166340), 40152 states have internal predecessors, (166340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:49,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40153 states to 40153 states and 166340 transitions. [2021-07-09 18:29:49,418 INFO L78 Accepts]: Start accepts. Automaton has 40153 states and 166340 transitions. Word has length 39 [2021-07-09 18:29:49,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:49,418 INFO L482 AbstractCegarLoop]: Abstraction has 40153 states and 166340 transitions. [2021-07-09 18:29:49,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 40153 states and 166340 transitions. [2021-07-09 18:29:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:29:49,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:49,513 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:49,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-07-09 18:29:49,729 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:49,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:49,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1810739247, now seen corresponding path program 78 times [2021-07-09 18:29:49,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:49,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769921774] [2021-07-09 18:29:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:50,250 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 18:29:50,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:50,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769921774] [2021-07-09 18:29:50,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769921774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:50,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134292798] [2021-07-09 18:29:50,250 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 18:29:50,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:29:50,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:50,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:29:50,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:50,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:29:50,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:50,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:50,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-09 18:29:50,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-07-09 18:29:50,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:50,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:50,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-07-09 18:29:50,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:50,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:50,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:50,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:28 [2021-07-09 18:29:50,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:50,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:29:50,691 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:50,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:50,705 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 18:29:50,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:33 [2021-07-09 18:29:50,798 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 18:29:50,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134292798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:50,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:50,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:29:50,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907183572] [2021-07-09 18:29:50,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:29:50,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:50,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:29:50,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:29:50,799 INFO L87 Difference]: Start difference. First operand 40153 states and 166340 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:51,793 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-07-09 18:29:56,975 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-07-09 18:29:58,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:58,218 INFO L93 Difference]: Finished difference Result 120932 states and 494689 transitions. [2021-07-09 18:29:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-09 18:29:58,219 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:29:58,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:58,792 INFO L225 Difference]: With dead ends: 120932 [2021-07-09 18:29:58,792 INFO L226 Difference]: Without dead ends: 120663 [2021-07-09 18:29:58,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4086 ImplicationChecksByTransitivity, 5399.9ms TimeCoverageRelationStatistics Valid=1668, Invalid=9888, Unknown=0, NotChecked=0, Total=11556 [2021-07-09 18:29:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120663 states. [2021-07-09 18:30:01,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120663 to 40812. [2021-07-09 18:30:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40812 states, 40811 states have (on average 4.141922520888976) internal successors, (169036), 40811 states have internal predecessors, (169036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40812 states to 40812 states and 169036 transitions. [2021-07-09 18:30:01,830 INFO L78 Accepts]: Start accepts. Automaton has 40812 states and 169036 transitions. Word has length 39 [2021-07-09 18:30:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:01,830 INFO L482 AbstractCegarLoop]: Abstraction has 40812 states and 169036 transitions. [2021-07-09 18:30:01,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:01,831 INFO L276 IsEmpty]: Start isEmpty. Operand 40812 states and 169036 transitions. [2021-07-09 18:30:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:01,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:01,941 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:02,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:02,153 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:02,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:02,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1846957111, now seen corresponding path program 79 times [2021-07-09 18:30:02,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:02,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820273450] [2021-07-09 18:30:02,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:02,465 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 18:30:02,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:02,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820273450] [2021-07-09 18:30:02,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820273450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:02,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625807376] [2021-07-09 18:30:02,466 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 18:30:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:02,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:30:02,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:02,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:30:02,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:02,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:02,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:02,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:30:02,719 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:30:02,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:30:02,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:02,917 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-09 18:30:02,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:02,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:02,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-09 18:30:02,987 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 18:30:02,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625807376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:02,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:02,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:30:02,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630378794] [2021-07-09 18:30:02,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:30:02,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:02,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:30:02,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:30:02,988 INFO L87 Difference]: Start difference. First operand 40812 states and 169036 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:05,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:05,822 INFO L93 Difference]: Finished difference Result 93840 states and 382143 transitions. [2021-07-09 18:30:05,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:30:05,822 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:05,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:06,641 INFO L225 Difference]: With dead ends: 93840 [2021-07-09 18:30:06,641 INFO L226 Difference]: Without dead ends: 93766 [2021-07-09 18:30:06,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1240.5ms TimeCoverageRelationStatistics Valid=379, Invalid=1973, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:30:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93766 states. [2021-07-09 18:30:08,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93766 to 40153. [2021-07-09 18:30:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40153 states, 40152 states have (on average 4.142757521418609) internal successors, (166340), 40152 states have internal predecessors, (166340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40153 states to 40153 states and 166340 transitions. [2021-07-09 18:30:09,054 INFO L78 Accepts]: Start accepts. Automaton has 40153 states and 166340 transitions. Word has length 39 [2021-07-09 18:30:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:09,054 INFO L482 AbstractCegarLoop]: Abstraction has 40153 states and 166340 transitions. [2021-07-09 18:30:09,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 40153 states and 166340 transitions. [2021-07-09 18:30:09,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:09,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:09,163 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:09,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:09,379 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:09,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:09,380 INFO L82 PathProgramCache]: Analyzing trace with hash 247806187, now seen corresponding path program 80 times [2021-07-09 18:30:09,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:09,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942515018] [2021-07-09 18:30:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:09,879 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-07-09 18:30:10,242 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 18:30:10,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:10,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942515018] [2021-07-09 18:30:10,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942515018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:10,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964459866] [2021-07-09 18:30:10,243 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 18:30:10,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:30:10,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:10,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:30:10,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:10,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:30:10,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:10,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:10,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:10,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:30:10,573 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:30:10,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:30:10,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:10,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:10,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:10,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:30:10,634 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 18:30:10,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964459866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:10,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:10,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:30:10,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364351401] [2021-07-09 18:30:10,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:30:10,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:10,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:30:10,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:30:10,635 INFO L87 Difference]: Start difference. First operand 40153 states and 166340 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:14,224 INFO L93 Difference]: Finished difference Result 116370 states and 472671 transitions. [2021-07-09 18:30:14,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:30:14,224 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:14,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:15,060 INFO L225 Difference]: With dead ends: 116370 [2021-07-09 18:30:15,060 INFO L226 Difference]: Without dead ends: 116234 [2021-07-09 18:30:15,060 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 2285.4ms TimeCoverageRelationStatistics Valid=533, Invalid=2889, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:30:15,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116234 states. [2021-07-09 18:30:17,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116234 to 39521. [2021-07-09 18:30:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39521 states, 39520 states have (on average 4.145141700404858) internal successors, (163816), 39520 states have internal predecessors, (163816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39521 states to 39521 states and 163816 transitions. [2021-07-09 18:30:17,556 INFO L78 Accepts]: Start accepts. Automaton has 39521 states and 163816 transitions. Word has length 39 [2021-07-09 18:30:17,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:17,556 INFO L482 AbstractCegarLoop]: Abstraction has 39521 states and 163816 transitions. [2021-07-09 18:30:17,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:17,556 INFO L276 IsEmpty]: Start isEmpty. Operand 39521 states and 163816 transitions. [2021-07-09 18:30:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:17,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:17,672 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:17,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:17,889 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:17,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:17,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2140222515, now seen corresponding path program 81 times [2021-07-09 18:30:17,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:17,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443387869] [2021-07-09 18:30:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:18,168 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 18:30:18,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:18,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443387869] [2021-07-09 18:30:18,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443387869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:18,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562427524] [2021-07-09 18:30:18,169 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 18:30:18,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:30:18,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:18,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:30:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:18,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:18,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:18,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:30:18,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:18,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:18,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:18,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:78 [2021-07-09 18:30:18,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:18,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:18,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2021-07-09 18:30:18,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:18,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:18,610 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-07-09 18:30:18,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:30:18,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:18,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:18,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2021-07-09 18:30:18,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:18,643 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:30:18,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-07-09 18:30:18,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:18,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:18,719 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 18:30:18,720 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:243, output treesize:308 [2021-07-09 18:30:19,029 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-09 18:30:19,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:19,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:30:19,165 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:30:19,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:19,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:19,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 18:30:19,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:19,235 INFO L628 ElimStorePlain]: treesize reduction 23, result has 64.1 percent of original size [2021-07-09 18:30:19,238 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 18:30:19,238 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:76, output treesize:42 [2021-07-09 18:30:19,388 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 18:30:19,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562427524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:19,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:19,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:30:19,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452601437] [2021-07-09 18:30:19,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:30:19,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:19,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:30:19,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:30:19,389 INFO L87 Difference]: Start difference. First operand 39521 states and 163816 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:22,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:22,874 INFO L93 Difference]: Finished difference Result 77354 states and 314932 transitions. [2021-07-09 18:30:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:30:22,875 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:22,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:23,255 INFO L225 Difference]: With dead ends: 77354 [2021-07-09 18:30:23,255 INFO L226 Difference]: Without dead ends: 77244 [2021-07-09 18:30:23,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 2769.6ms TimeCoverageRelationStatistics Valid=693, Invalid=2847, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:30:23,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77244 states. [2021-07-09 18:30:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77244 to 39808. [2021-07-09 18:30:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39808 states, 39807 states have (on average 4.143693320270304) internal successors, (164948), 39807 states have internal predecessors, (164948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39808 states to 39808 states and 164948 transitions. [2021-07-09 18:30:25,683 INFO L78 Accepts]: Start accepts. Automaton has 39808 states and 164948 transitions. Word has length 39 [2021-07-09 18:30:25,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:25,684 INFO L482 AbstractCegarLoop]: Abstraction has 39808 states and 164948 transitions. [2021-07-09 18:30:25,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 39808 states and 164948 transitions. [2021-07-09 18:30:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:25,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:25,863 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:26,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-07-09 18:30:26,080 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:26,080 INFO L82 PathProgramCache]: Analyzing trace with hash 458385605, now seen corresponding path program 82 times [2021-07-09 18:30:26,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:26,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704378007] [2021-07-09 18:30:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:26,365 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 18:30:26,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:26,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704378007] [2021-07-09 18:30:26,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704378007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:26,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681819928] [2021-07-09 18:30:26,366 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 18:30:26,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:30:26,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:26,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:30:26,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:26,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:30:26,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:26,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:26,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:26,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-09 18:30:26,633 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:30:26,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:30:26,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:26,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:26,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:26,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-09 18:30:26,710 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 18:30:26,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681819928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:26,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:26,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:30:26,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388116067] [2021-07-09 18:30:26,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:30:26,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:26,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:30:26,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:30:26,711 INFO L87 Difference]: Start difference. First operand 39808 states and 164948 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:27,551 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-07-09 18:30:29,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:29,334 INFO L93 Difference]: Finished difference Result 98952 states and 404548 transitions. [2021-07-09 18:30:29,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:30:29,334 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:29,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:30,088 INFO L225 Difference]: With dead ends: 98952 [2021-07-09 18:30:30,088 INFO L226 Difference]: Without dead ends: 98897 [2021-07-09 18:30:30,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1422.5ms TimeCoverageRelationStatistics Valid=400, Invalid=1952, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:30:30,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98897 states. [2021-07-09 18:30:32,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98897 to 41626. [2021-07-09 18:30:32,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41626 states, 41625 states have (on average 4.144912912912913) internal successors, (172532), 41625 states have internal predecessors, (172532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41626 states to 41626 states and 172532 transitions. [2021-07-09 18:30:32,240 INFO L78 Accepts]: Start accepts. Automaton has 41626 states and 172532 transitions. Word has length 39 [2021-07-09 18:30:32,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:32,240 INFO L482 AbstractCegarLoop]: Abstraction has 41626 states and 172532 transitions. [2021-07-09 18:30:32,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 41626 states and 172532 transitions. [2021-07-09 18:30:32,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:32,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:32,335 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:32,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-09 18:30:32,549 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:32,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:32,549 INFO L82 PathProgramCache]: Analyzing trace with hash -798003409, now seen corresponding path program 83 times [2021-07-09 18:30:32,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:32,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904410250] [2021-07-09 18:30:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:32,858 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 18:30:32,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:32,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904410250] [2021-07-09 18:30:32,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904410250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:32,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965941810] [2021-07-09 18:30:32,858 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 18:30:32,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:30:32,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:32,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:30:32,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:33,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:30:33,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:33,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:33,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:33,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-09 18:30:33,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:33,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-07-09 18:30:33,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:33,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:33,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:30:33,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:25 [2021-07-09 18:30:33,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:33,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:30:33,649 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:30:33,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:33,656 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 18:30:33,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:30:33,703 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 18:30:33,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965941810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:33,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:33,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:30:33,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335072617] [2021-07-09 18:30:33,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:30:33,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:33,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:30:33,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:30:33,705 INFO L87 Difference]: Start difference. First operand 41626 states and 172532 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:35,096 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-07-09 18:30:38,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:38,108 INFO L93 Difference]: Finished difference Result 86010 states and 349681 transitions. [2021-07-09 18:30:38,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:30:38,109 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:38,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:38,468 INFO L225 Difference]: With dead ends: 86010 [2021-07-09 18:30:38,468 INFO L226 Difference]: Without dead ends: 85900 [2021-07-09 18:30:38,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 3340.3ms TimeCoverageRelationStatistics Valid=1085, Invalid=5557, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:30:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85900 states. [2021-07-09 18:30:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85900 to 42486. [2021-07-09 18:30:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42486 states, 42485 states have (on average 4.143580087089561) internal successors, (176040), 42485 states have internal predecessors, (176040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42486 states to 42486 states and 176040 transitions. [2021-07-09 18:30:40,284 INFO L78 Accepts]: Start accepts. Automaton has 42486 states and 176040 transitions. Word has length 39 [2021-07-09 18:30:40,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:40,284 INFO L482 AbstractCegarLoop]: Abstraction has 42486 states and 176040 transitions. [2021-07-09 18:30:40,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:40,285 INFO L276 IsEmpty]: Start isEmpty. Operand 42486 states and 176040 transitions. [2021-07-09 18:30:40,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:40,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:40,391 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:40,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-07-09 18:30:40,607 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:40,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:40,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1274133635, now seen corresponding path program 84 times [2021-07-09 18:30:40,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:40,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492918353] [2021-07-09 18:30:40,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:41,170 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 18:30:41,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:41,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492918353] [2021-07-09 18:30:41,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492918353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:41,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65237452] [2021-07-09 18:30:41,171 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 18:30:41,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:30:41,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:41,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:30:41,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:41,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:30:41,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:41,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:41,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:41,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-09 18:30:41,438 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:30:41,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:30:41,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:41,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:41,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:41,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:30:41,482 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 18:30:41,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65237452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:41,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:41,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:30:41,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282884871] [2021-07-09 18:30:41,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:30:41,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:41,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:30:41,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:30:41,483 INFO L87 Difference]: Start difference. First operand 42486 states and 176040 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:42,732 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-07-09 18:30:44,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:44,180 INFO L93 Difference]: Finished difference Result 100201 states and 409486 transitions. [2021-07-09 18:30:44,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:30:44,181 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:44,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:44,646 INFO L225 Difference]: With dead ends: 100201 [2021-07-09 18:30:44,646 INFO L226 Difference]: Without dead ends: 100146 [2021-07-09 18:30:44,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1541.2ms TimeCoverageRelationStatistics Valid=433, Invalid=2017, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:30:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100146 states. [2021-07-09 18:30:46,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100146 to 41898. [2021-07-09 18:30:46,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41898 states, 41897 states have (on average 4.146358927846863) internal successors, (173720), 41897 states have internal predecessors, (173720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41898 states to 41898 states and 173720 transitions. [2021-07-09 18:30:47,297 INFO L78 Accepts]: Start accepts. Automaton has 41898 states and 173720 transitions. Word has length 39 [2021-07-09 18:30:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:47,297 INFO L482 AbstractCegarLoop]: Abstraction has 41898 states and 173720 transitions. [2021-07-09 18:30:47,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:47,298 INFO L276 IsEmpty]: Start isEmpty. Operand 41898 states and 173720 transitions. [2021-07-09 18:30:47,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:47,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:47,414 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:47,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:47,629 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:47,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:47,629 INFO L82 PathProgramCache]: Analyzing trace with hash 691348715, now seen corresponding path program 85 times [2021-07-09 18:30:47,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:47,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493856113] [2021-07-09 18:30:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:47,952 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 18:30:47,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:47,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493856113] [2021-07-09 18:30:47,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493856113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:47,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210947495] [2021-07-09 18:30:47,952 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 18:30:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:47,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:30:47,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:48,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:30:48,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:48,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:48,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:48,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-09 18:30:48,250 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:30:48,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:30:48,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:48,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:48,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:48,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:30:48,300 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 18:30:48,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210947495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:48,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:48,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:30:48,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639197349] [2021-07-09 18:30:48,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:30:48,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:48,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:30:48,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:30:48,301 INFO L87 Difference]: Start difference. First operand 41898 states and 173720 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:50,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:50,491 INFO L93 Difference]: Finished difference Result 82479 states and 338687 transitions. [2021-07-09 18:30:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:30:50,492 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:50,862 INFO L225 Difference]: With dead ends: 82479 [2021-07-09 18:30:50,862 INFO L226 Difference]: Without dead ends: 82424 [2021-07-09 18:30:50,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 956.2ms TimeCoverageRelationStatistics Valid=337, Invalid=1385, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:30:51,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82424 states. [2021-07-09 18:30:52,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82424 to 41202. [2021-07-09 18:30:52,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41202 states, 41201 states have (on average 4.142520812601636) internal successors, (170676), 41201 states have internal predecessors, (170676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41202 states to 41202 states and 170676 transitions. [2021-07-09 18:30:53,122 INFO L78 Accepts]: Start accepts. Automaton has 41202 states and 170676 transitions. Word has length 39 [2021-07-09 18:30:53,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:53,123 INFO L482 AbstractCegarLoop]: Abstraction has 41202 states and 170676 transitions. [2021-07-09 18:30:53,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 41202 states and 170676 transitions. [2021-07-09 18:30:53,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:53,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:53,243 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:53,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-07-09 18:30:53,460 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:53,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:53,460 INFO L82 PathProgramCache]: Analyzing trace with hash 983531635, now seen corresponding path program 86 times [2021-07-09 18:30:53,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:53,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252473961] [2021-07-09 18:30:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:53,708 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 18:30:53,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:53,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252473961] [2021-07-09 18:30:53,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252473961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:53,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261216702] [2021-07-09 18:30:53,709 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 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 18:30:53,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:30:53,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:53,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:30:53,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:53,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:30:53,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:53,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:53,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:53,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-09 18:30:53,972 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:30:53,972 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:30:53,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:53,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:53,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:53,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:30:54,013 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 18:30:54,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261216702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:54,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:54,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:30:54,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777171902] [2021-07-09 18:30:54,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:30:54,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:54,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:30:54,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:30:54,014 INFO L87 Difference]: Start difference. First operand 41202 states and 170676 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:56,197 INFO L93 Difference]: Finished difference Result 85275 states and 350117 transitions. [2021-07-09 18:30:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:30:56,197 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:30:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:56,545 INFO L225 Difference]: With dead ends: 85275 [2021-07-09 18:30:56,545 INFO L226 Difference]: Without dead ends: 85220 [2021-07-09 18:30:56,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 875.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:30:56,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85220 states. [2021-07-09 18:30:57,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85220 to 41643. [2021-07-09 18:30:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41643 states, 41642 states have (on average 4.147975601556121) internal successors, (172730), 41642 states have internal predecessors, (172730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:58,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41643 states to 41643 states and 172730 transitions. [2021-07-09 18:30:58,421 INFO L78 Accepts]: Start accepts. Automaton has 41643 states and 172730 transitions. Word has length 39 [2021-07-09 18:30:58,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:58,421 INFO L482 AbstractCegarLoop]: Abstraction has 41643 states and 172730 transitions. [2021-07-09 18:30:58,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:58,421 INFO L276 IsEmpty]: Start isEmpty. Operand 41643 states and 172730 transitions. [2021-07-09 18:30:58,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:30:58,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:58,520 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:58,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-07-09 18:30:58,733 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:58,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:58,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1822083537, now seen corresponding path program 87 times [2021-07-09 18:30:58,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:58,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350603256] [2021-07-09 18:30:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:59,004 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 18:30:59,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:59,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350603256] [2021-07-09 18:30:59,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350603256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:59,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088084401] [2021-07-09 18:30:59,005 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 18:30:59,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:30:59,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:59,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:30:59,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:59,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-07-09 18:30:59,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:59,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:59,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:59,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:40 [2021-07-09 18:30:59,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:59,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:59,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:30:59,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:59,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:59,343 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 18:30:59,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:75 [2021-07-09 18:30:59,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:59,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:30:59,391 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:30:59,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:59,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:59,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-07-09 18:30:59,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:59,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:59,432 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 18:30:59,432 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-07-09 18:30:59,657 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-07-09 18:30:59,714 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 18:30:59,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088084401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:59,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:59,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:30:59,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776835815] [2021-07-09 18:30:59,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:30:59,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:59,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:30:59,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:30:59,715 INFO L87 Difference]: Start difference. First operand 41643 states and 172730 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:04,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:04,770 INFO L93 Difference]: Finished difference Result 98168 states and 401438 transitions. [2021-07-09 18:31:04,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:31:04,771 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:04,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:05,168 INFO L225 Difference]: With dead ends: 98168 [2021-07-09 18:31:05,169 INFO L226 Difference]: Without dead ends: 98026 [2021-07-09 18:31:05,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2668 ImplicationChecksByTransitivity, 3750.1ms TimeCoverageRelationStatistics Valid=1322, Invalid=6160, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:31:05,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98026 states. [2021-07-09 18:31:07,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98026 to 43365. [2021-07-09 18:31:07,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43365 states, 43364 states have (on average 4.146642376164561) internal successors, (179815), 43364 states have internal predecessors, (179815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43365 states to 43365 states and 179815 transitions. [2021-07-09 18:31:07,509 INFO L78 Accepts]: Start accepts. Automaton has 43365 states and 179815 transitions. Word has length 39 [2021-07-09 18:31:07,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:07,509 INFO L482 AbstractCegarLoop]: Abstraction has 43365 states and 179815 transitions. [2021-07-09 18:31:07,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:07,509 INFO L276 IsEmpty]: Start isEmpty. Operand 43365 states and 179815 transitions. [2021-07-09 18:31:07,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:07,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:07,607 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:07,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:07,823 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:07,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:07,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1184812599, now seen corresponding path program 88 times [2021-07-09 18:31:07,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:07,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670221097] [2021-07-09 18:31:07,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:08,100 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 18:31:08,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:08,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670221097] [2021-07-09 18:31:08,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670221097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:08,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559075508] [2021-07-09 18:31:08,100 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 18:31:08,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:31:08,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:08,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:31:08,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:08,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:31:08,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:08,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-09 18:31:08,869 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:31:08,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:31:08,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:08,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:31:08,916 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 18:31:08,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559075508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:08,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:08,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:31:08,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389734995] [2021-07-09 18:31:08,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:31:08,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:08,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:31:08,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:31:08,917 INFO L87 Difference]: Start difference. First operand 43365 states and 179815 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:11,517 INFO L93 Difference]: Finished difference Result 100263 states and 410482 transitions. [2021-07-09 18:31:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:31:11,518 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:11,958 INFO L225 Difference]: With dead ends: 100263 [2021-07-09 18:31:11,959 INFO L226 Difference]: Without dead ends: 100208 [2021-07-09 18:31:11,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1272.8ms TimeCoverageRelationStatistics Valid=433, Invalid=2017, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:31:12,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100208 states. [2021-07-09 18:31:13,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100208 to 41371. [2021-07-09 18:31:13,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41371 states, 41370 states have (on average 4.146531302876481) internal successors, (171542), 41370 states have internal predecessors, (171542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:14,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41371 states to 41371 states and 171542 transitions. [2021-07-09 18:31:14,331 INFO L78 Accepts]: Start accepts. Automaton has 41371 states and 171542 transitions. Word has length 39 [2021-07-09 18:31:14,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:14,331 INFO L482 AbstractCegarLoop]: Abstraction has 41371 states and 171542 transitions. [2021-07-09 18:31:14,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 41371 states and 171542 transitions. [2021-07-09 18:31:14,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:14,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:14,445 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:14,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:14,660 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:14,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:14,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2134546223, now seen corresponding path program 89 times [2021-07-09 18:31:14,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:14,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907641608] [2021-07-09 18:31:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:14,925 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 18:31:14,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:14,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907641608] [2021-07-09 18:31:14,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907641608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:14,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337454913] [2021-07-09 18:31:14,925 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 18:31:14,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:31:14,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:14,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:31:14,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:15,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-07-09 18:31:15,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:15,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:28 [2021-07-09 18:31:15,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:15,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 52 [2021-07-09 18:31:15,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:15,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:15,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:31:15,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:30 [2021-07-09 18:31:15,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:15,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:15,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-07-09 18:31:15,321 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:31:15,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:15,337 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 18:31:15,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-07-09 18:31:15,428 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 18:31:15,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337454913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:15,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:15,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:31:15,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227002190] [2021-07-09 18:31:15,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:31:15,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:15,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:31:15,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:31:15,429 INFO L87 Difference]: Start difference. First operand 41371 states and 171542 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:15,957 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-07-09 18:31:17,281 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-07-09 18:31:20,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:20,780 INFO L93 Difference]: Finished difference Result 111193 states and 459274 transitions. [2021-07-09 18:31:20,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:31:20,780 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:20,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:21,287 INFO L225 Difference]: With dead ends: 111193 [2021-07-09 18:31:21,287 INFO L226 Difference]: Without dead ends: 111083 [2021-07-09 18:31:21,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 3407.6ms TimeCoverageRelationStatistics Valid=1109, Invalid=5211, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:31:21,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111083 states. [2021-07-09 18:31:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111083 to 42114. [2021-07-09 18:31:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42114 states, 42113 states have (on average 4.147104219599648) internal successors, (174647), 42113 states have internal predecessors, (174647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:23,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42114 states to 42114 states and 174647 transitions. [2021-07-09 18:31:23,495 INFO L78 Accepts]: Start accepts. Automaton has 42114 states and 174647 transitions. Word has length 39 [2021-07-09 18:31:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:23,495 INFO L482 AbstractCegarLoop]: Abstraction has 42114 states and 174647 transitions. [2021-07-09 18:31:23,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:23,495 INFO L276 IsEmpty]: Start isEmpty. Operand 42114 states and 174647 transitions. [2021-07-09 18:31:23,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:23,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:23,587 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:23,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:23,803 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:23,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:23,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1523150135, now seen corresponding path program 90 times [2021-07-09 18:31:23,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:23,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665434879] [2021-07-09 18:31:23,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:24,074 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 18:31:24,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:24,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665434879] [2021-07-09 18:31:24,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665434879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:24,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98115360] [2021-07-09 18:31:24,075 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 18:31:24,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:31:24,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:24,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:31:24,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:24,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:31:24,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:24,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:24,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:24,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-09 18:31:24,519 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:31:24,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:31:24,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:24,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:24,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:24,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:15 [2021-07-09 18:31:24,583 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 18:31:24,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98115360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:24,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:24,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:31:24,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451774410] [2021-07-09 18:31:24,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:31:24,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:24,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:31:24,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:31:24,584 INFO L87 Difference]: Start difference. First operand 42114 states and 174647 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:27,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:27,079 INFO L93 Difference]: Finished difference Result 96972 states and 397209 transitions. [2021-07-09 18:31:27,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:31:27,079 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:27,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:27,479 INFO L225 Difference]: With dead ends: 96972 [2021-07-09 18:31:27,479 INFO L226 Difference]: Without dead ends: 96917 [2021-07-09 18:31:27,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1254.4ms TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:31:27,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96917 states. [2021-07-09 18:31:29,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96917 to 41581. [2021-07-09 18:31:29,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41581 states, 41580 states have (on average 4.149446849446849) internal successors, (172534), 41580 states have internal predecessors, (172534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:29,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41581 states to 41581 states and 172534 transitions. [2021-07-09 18:31:29,282 INFO L78 Accepts]: Start accepts. Automaton has 41581 states and 172534 transitions. Word has length 39 [2021-07-09 18:31:29,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:29,282 INFO L482 AbstractCegarLoop]: Abstraction has 41581 states and 172534 transitions. [2021-07-09 18:31:29,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:29,282 INFO L276 IsEmpty]: Start isEmpty. Operand 41581 states and 172534 transitions. [2021-07-09 18:31:29,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:29,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:29,650 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:29,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-07-09 18:31:29,867 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:29,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:29,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1346065441, now seen corresponding path program 91 times [2021-07-09 18:31:29,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:29,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851760543] [2021-07-09 18:31:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:30,187 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 18:31:30,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:30,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851760543] [2021-07-09 18:31:30,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851760543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:30,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497887863] [2021-07-09 18:31:30,187 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 18:31:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:30,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:31:30,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:30,355 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:31:30,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:30,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:30,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:30,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:30,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-09 18:31:30,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:31:30,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:30,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:30,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:30,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:31:30,532 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 18:31:30,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497887863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:30,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:30,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:31:30,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502769067] [2021-07-09 18:31:30,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:31:30,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:30,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:31:30,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:31:30,533 INFO L87 Difference]: Start difference. First operand 41581 states and 172534 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:31,332 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-07-09 18:31:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:32,725 INFO L93 Difference]: Finished difference Result 70550 states and 289014 transitions. [2021-07-09 18:31:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:31:32,726 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:33,064 INFO L225 Difference]: With dead ends: 70550 [2021-07-09 18:31:33,064 INFO L226 Difference]: Without dead ends: 70358 [2021-07-09 18:31:33,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1313.4ms TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:31:33,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70358 states. [2021-07-09 18:31:34,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70358 to 41754. [2021-07-09 18:31:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41754 states, 41753 states have (on average 4.147246904414054) internal successors, (173160), 41753 states have internal predecessors, (173160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41754 states to 41754 states and 173160 transitions. [2021-07-09 18:31:34,876 INFO L78 Accepts]: Start accepts. Automaton has 41754 states and 173160 transitions. Word has length 39 [2021-07-09 18:31:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:34,876 INFO L482 AbstractCegarLoop]: Abstraction has 41754 states and 173160 transitions. [2021-07-09 18:31:34,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 41754 states and 173160 transitions. [2021-07-09 18:31:34,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:34,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:34,980 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:35,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:35,196 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:35,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:35,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1579983005, now seen corresponding path program 92 times [2021-07-09 18:31:35,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:35,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587331694] [2021-07-09 18:31:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:35,768 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 18:31:35,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:35,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587331694] [2021-07-09 18:31:35,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587331694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:35,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276594259] [2021-07-09 18:31:35,769 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 18:31:35,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:31:35,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:35,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:31:35,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:35,939 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:31:35,940 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:35,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:35,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:35,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:35,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-09 18:31:36,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:31:36,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:36,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:36,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:36,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:31:36,130 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 18:31:36,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276594259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:36,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:36,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:31:36,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981293080] [2021-07-09 18:31:36,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:31:36,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:36,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:31:36,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:31:36,132 INFO L87 Difference]: Start difference. First operand 41754 states and 173160 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:38,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:38,311 INFO L93 Difference]: Finished difference Result 71559 states and 293044 transitions. [2021-07-09 18:31:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:31:38,312 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:38,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:38,973 INFO L225 Difference]: With dead ends: 71559 [2021-07-09 18:31:38,973 INFO L226 Difference]: Without dead ends: 71343 [2021-07-09 18:31:38,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1332.7ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:31:39,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71343 states. [2021-07-09 18:31:40,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71343 to 41816. [2021-07-09 18:31:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41816 states, 41815 states have (on average 4.1483678105942845) internal successors, (173464), 41815 states have internal predecessors, (173464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41816 states to 41816 states and 173464 transitions. [2021-07-09 18:31:41,049 INFO L78 Accepts]: Start accepts. Automaton has 41816 states and 173464 transitions. Word has length 39 [2021-07-09 18:31:41,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:41,049 INFO L482 AbstractCegarLoop]: Abstraction has 41816 states and 173464 transitions. [2021-07-09 18:31:41,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:41,049 INFO L276 IsEmpty]: Start isEmpty. Operand 41816 states and 173464 transitions. [2021-07-09 18:31:41,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:41,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:41,156 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:41,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:41,373 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:41,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:41,373 INFO L82 PathProgramCache]: Analyzing trace with hash 231872611, now seen corresponding path program 93 times [2021-07-09 18:31:41,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:41,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522194280] [2021-07-09 18:31:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:41,688 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 18:31:41,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:41,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522194280] [2021-07-09 18:31:41,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522194280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:41,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092290199] [2021-07-09 18:31:41,688 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 18:31:41,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:31:41,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:41,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:31:41,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:42,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:42,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:42,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-09 18:31:42,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:42,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:42,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:42,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:85 [2021-07-09 18:31:42,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:42,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-07-09 18:31:42,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:42,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:42,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:42,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:43 [2021-07-09 18:31:42,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:42,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:42,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-07-09 18:31:42,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:31:42,637 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:31:42,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 12 [2021-07-09 18:31:42,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:42,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:42,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 18:31:42,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:42,698 INFO L628 ElimStorePlain]: treesize reduction 36, result has 60.0 percent of original size [2021-07-09 18:31:42,700 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 18:31:42,700 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:111, output treesize:45 [2021-07-09 18:31:42,828 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 18:31:42,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092290199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:42,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:42,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:31:42,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711628170] [2021-07-09 18:31:42,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:31:42,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:42,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:31:42,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:31:42,829 INFO L87 Difference]: Start difference. First operand 41816 states and 173464 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:45,812 INFO L93 Difference]: Finished difference Result 69576 states and 283666 transitions. [2021-07-09 18:31:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:31:45,812 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:46,069 INFO L225 Difference]: With dead ends: 69576 [2021-07-09 18:31:46,069 INFO L226 Difference]: Without dead ends: 69466 [2021-07-09 18:31:46,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 2507.3ms TimeCoverageRelationStatistics Valid=668, Invalid=2638, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:31:46,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69466 states. [2021-07-09 18:31:47,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69466 to 42033. [2021-07-09 18:31:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42033 states, 42032 states have (on average 4.145365435858394) internal successors, (174238), 42032 states have internal predecessors, (174238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42033 states to 42033 states and 174238 transitions. [2021-07-09 18:31:47,602 INFO L78 Accepts]: Start accepts. Automaton has 42033 states and 174238 transitions. Word has length 39 [2021-07-09 18:31:47,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:47,603 INFO L482 AbstractCegarLoop]: Abstraction has 42033 states and 174238 transitions. [2021-07-09 18:31:47,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:47,603 INFO L276 IsEmpty]: Start isEmpty. Operand 42033 states and 174238 transitions. [2021-07-09 18:31:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:47,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:47,697 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:47,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:47,913 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:47,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1449964299, now seen corresponding path program 94 times [2021-07-09 18:31:47,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:47,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082109334] [2021-07-09 18:31:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:48,426 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 18:31:48,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:48,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082109334] [2021-07-09 18:31:48,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082109334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:48,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350907872] [2021-07-09 18:31:48,426 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 18:31:48,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:31:48,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:48,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:31:48,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:48,597 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:31:48,597 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:31:48,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:48,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:48,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:48,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-09 18:31:48,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:31:48,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:48,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:48,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:48,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-09 18:31:48,759 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 18:31:48,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350907872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:48,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:48,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:31:48,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552152513] [2021-07-09 18:31:48,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:31:48,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:48,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:31:48,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:31:48,760 INFO L87 Difference]: Start difference. First operand 42033 states and 174238 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:51,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:51,058 INFO L93 Difference]: Finished difference Result 89826 states and 367488 transitions. [2021-07-09 18:31:51,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:31:51,058 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:51,431 INFO L225 Difference]: With dead ends: 89826 [2021-07-09 18:31:51,431 INFO L226 Difference]: Without dead ends: 89771 [2021-07-09 18:31:51,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 996.3ms TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:31:51,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89771 states. [2021-07-09 18:31:53,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89771 to 41715. [2021-07-09 18:31:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41715 states, 41714 states have (on average 4.14752840772882) internal successors, (173010), 41714 states have internal predecessors, (173010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:53,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41715 states to 41715 states and 173010 transitions. [2021-07-09 18:31:53,867 INFO L78 Accepts]: Start accepts. Automaton has 41715 states and 173010 transitions. Word has length 39 [2021-07-09 18:31:53,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:53,868 INFO L482 AbstractCegarLoop]: Abstraction has 41715 states and 173010 transitions. [2021-07-09 18:31:53,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand 41715 states and 173010 transitions. [2021-07-09 18:31:54,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:54,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:54,039 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:54,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-07-09 18:31:54,255 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:54,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:54,255 INFO L82 PathProgramCache]: Analyzing trace with hash 401310577, now seen corresponding path program 95 times [2021-07-09 18:31:54,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:54,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964168260] [2021-07-09 18:31:54,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:54,592 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 18:31:54,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:54,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964168260] [2021-07-09 18:31:54,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964168260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:54,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693349806] [2021-07-09 18:31:54,593 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 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 18:31:54,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:31:54,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:54,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:31:54,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:54,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:54,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:54,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:54,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:54,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-07-09 18:31:54,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:31:54,877 INFO L628 ElimStorePlain]: treesize reduction 37, result has 54.3 percent of original size [2021-07-09 18:31:54,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:54,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:45 [2021-07-09 18:31:55,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:31:55,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:55,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:55,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:55,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:31:55,067 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 18:31:55,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693349806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:55,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:55,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:31:55,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308235408] [2021-07-09 18:31:55,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:31:55,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:55,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:31:55,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:31:55,068 INFO L87 Difference]: Start difference. First operand 41715 states and 173010 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:57,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:57,956 INFO L93 Difference]: Finished difference Result 68574 states and 280232 transitions. [2021-07-09 18:31:57,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:31:57,956 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:31:57,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:58,208 INFO L225 Difference]: With dead ends: 68574 [2021-07-09 18:31:58,209 INFO L226 Difference]: Without dead ends: 68446 [2021-07-09 18:31:58,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1564.6ms TimeCoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:31:58,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68446 states. [2021-07-09 18:31:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68446 to 42130. [2021-07-09 18:31:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42130 states, 42129 states have (on average 4.142562130598875) internal successors, (174522), 42129 states have internal predecessors, (174522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42130 states to 42130 states and 174522 transitions. [2021-07-09 18:31:59,672 INFO L78 Accepts]: Start accepts. Automaton has 42130 states and 174522 transitions. Word has length 39 [2021-07-09 18:31:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:59,673 INFO L482 AbstractCegarLoop]: Abstraction has 42130 states and 174522 transitions. [2021-07-09 18:31:59,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:59,673 INFO L276 IsEmpty]: Start isEmpty. Operand 42130 states and 174522 transitions. [2021-07-09 18:31:59,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:31:59,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:59,983 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:00,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-07-09 18:32:00,197 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:00,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:00,198 INFO L82 PathProgramCache]: Analyzing trace with hash 167393013, now seen corresponding path program 96 times [2021-07-09 18:32:00,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:00,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899663039] [2021-07-09 18:32:00,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:00,510 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 18:32:00,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:00,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899663039] [2021-07-09 18:32:00,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899663039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:00,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903051560] [2021-07-09 18:32:00,510 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 18:32:00,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:32:00,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:00,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 18:32:00,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:00,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:00,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-07-09 18:32:00,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:00,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:00,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:00,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:43 [2021-07-09 18:32:00,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:32:00,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:00,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:00,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:00,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:32:00,941 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 18:32:00,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903051560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:00,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:00,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:32:00,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7914571] [2021-07-09 18:32:00,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:32:00,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:00,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:32:00,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:32:00,942 INFO L87 Difference]: Start difference. First operand 42130 states and 174522 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:03,532 INFO L93 Difference]: Finished difference Result 69626 states and 284381 transitions. [2021-07-09 18:32:03,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:32:03,532 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:03,795 INFO L225 Difference]: With dead ends: 69626 [2021-07-09 18:32:03,795 INFO L226 Difference]: Without dead ends: 69498 [2021-07-09 18:32:03,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1551.2ms TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:32:03,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69498 states. [2021-07-09 18:32:05,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69498 to 42280. [2021-07-09 18:32:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42280 states, 42279 states have (on average 4.141772511175761) internal successors, (175110), 42279 states have internal predecessors, (175110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42280 states to 42280 states and 175110 transitions. [2021-07-09 18:32:05,262 INFO L78 Accepts]: Start accepts. Automaton has 42280 states and 175110 transitions. Word has length 39 [2021-07-09 18:32:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:05,262 INFO L482 AbstractCegarLoop]: Abstraction has 42280 states and 175110 transitions. [2021-07-09 18:32:05,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 42280 states and 175110 transitions. [2021-07-09 18:32:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:05,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:05,603 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:05,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:05,821 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:05,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:05,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1979248629, now seen corresponding path program 97 times [2021-07-09 18:32:05,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:05,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73748030] [2021-07-09 18:32:05,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:06,094 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 18:32:06,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:06,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73748030] [2021-07-09 18:32:06,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73748030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:06,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392040682] [2021-07-09 18:32:06,094 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 18:32:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:06,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:32:06,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:06,294 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:32:06,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:32:06,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:06,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:06,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:06,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:32:06,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:32:06,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:06,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:06,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:06,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-09 18:32:06,435 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 18:32:06,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392040682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:06,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:06,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:32:06,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419734749] [2021-07-09 18:32:06,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:32:06,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:06,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:32:06,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:06,435 INFO L87 Difference]: Start difference. First operand 42280 states and 175110 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:08,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:08,405 INFO L93 Difference]: Finished difference Result 75888 states and 312435 transitions. [2021-07-09 18:32:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:32:08,405 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:08,712 INFO L225 Difference]: With dead ends: 75888 [2021-07-09 18:32:08,712 INFO L226 Difference]: Without dead ends: 75833 [2021-07-09 18:32:08,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 897.0ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:32:08,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75833 states. [2021-07-09 18:32:10,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75833 to 42258. [2021-07-09 18:32:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42258 states, 42257 states have (on average 4.142248621530161) internal successors, (175039), 42257 states have internal predecessors, (175039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42258 states to 42258 states and 175039 transitions. [2021-07-09 18:32:10,347 INFO L78 Accepts]: Start accepts. Automaton has 42258 states and 175039 transitions. Word has length 39 [2021-07-09 18:32:10,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:10,347 INFO L482 AbstractCegarLoop]: Abstraction has 42258 states and 175039 transitions. [2021-07-09 18:32:10,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:10,348 INFO L276 IsEmpty]: Start isEmpty. Operand 42258 states and 175039 transitions. [2021-07-09 18:32:10,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:10,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:10,441 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:10,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:10,657 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:10,657 INFO L82 PathProgramCache]: Analyzing trace with hash 210357187, now seen corresponding path program 98 times [2021-07-09 18:32:10,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:10,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116863971] [2021-07-09 18:32:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:10,982 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 18:32:10,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:10,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116863971] [2021-07-09 18:32:10,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116863971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:10,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981333536] [2021-07-09 18:32:10,983 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 18:32:11,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:11,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:11,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:32:11,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:11,331 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-07-09 18:32:11,461 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:32:11,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:32:11,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:11,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:11,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:11,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-07-09 18:32:11,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:32:11,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:11,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:11,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:11,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:32:11,613 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 18:32:11,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981333536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:11,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:11,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:32:11,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513397742] [2021-07-09 18:32:11,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:32:11,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:11,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:32:11,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:11,614 INFO L87 Difference]: Start difference. First operand 42258 states and 175039 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:13,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:13,972 INFO L93 Difference]: Finished difference Result 85721 states and 348629 transitions. [2021-07-09 18:32:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:32:13,972 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:14,303 INFO L225 Difference]: With dead ends: 85721 [2021-07-09 18:32:14,303 INFO L226 Difference]: Without dead ends: 85537 [2021-07-09 18:32:14,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1447.1ms TimeCoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:32:14,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85537 states. [2021-07-09 18:32:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85537 to 42230. [2021-07-09 18:32:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42230 states, 42229 states have (on average 4.142769187051552) internal successors, (174945), 42229 states have internal predecessors, (174945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42230 states to 42230 states and 174945 transitions. [2021-07-09 18:32:16,010 INFO L78 Accepts]: Start accepts. Automaton has 42230 states and 174945 transitions. Word has length 39 [2021-07-09 18:32:16,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:16,011 INFO L482 AbstractCegarLoop]: Abstraction has 42230 states and 174945 transitions. [2021-07-09 18:32:16,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:16,011 INFO L276 IsEmpty]: Start isEmpty. Operand 42230 states and 174945 transitions. [2021-07-09 18:32:16,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:16,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:16,102 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:16,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-07-09 18:32:16,317 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:16,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:16,317 INFO L82 PathProgramCache]: Analyzing trace with hash -912760441, now seen corresponding path program 99 times [2021-07-09 18:32:16,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:16,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446026313] [2021-07-09 18:32:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:16,681 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-07-09 18:32:16,891 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 18:32:16,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:16,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446026313] [2021-07-09 18:32:16,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446026313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:16,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959230449] [2021-07-09 18:32:16,892 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 18:32:16,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:32:16,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:16,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:32:16,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:17,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:17,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:17,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-09 18:32:17,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:17,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:17,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:17,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:88 [2021-07-09 18:32:17,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-07-09 18:32:17,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:17,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:17,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:17,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:9 [2021-07-09 18:32:17,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:17,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:32:17,317 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:17,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:17,325 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 18:32:17,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:32:17,375 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 18:32:17,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959230449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:17,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:17,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:32:17,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352763821] [2021-07-09 18:32:17,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:32:17,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:17,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:32:17,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:32:17,376 INFO L87 Difference]: Start difference. First operand 42230 states and 174945 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:18,305 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-07-09 18:32:21,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:21,273 INFO L93 Difference]: Finished difference Result 89279 states and 362432 transitions. [2021-07-09 18:32:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:32:21,274 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:21,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:21,626 INFO L225 Difference]: With dead ends: 89279 [2021-07-09 18:32:21,627 INFO L226 Difference]: Without dead ends: 88857 [2021-07-09 18:32:21,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 2642.5ms TimeCoverageRelationStatistics Valid=747, Invalid=4083, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:32:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88857 states. [2021-07-09 18:32:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88857 to 41749. [2021-07-09 18:32:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41749 states, 41748 states have (on average 4.147408259078279) internal successors, (173146), 41748 states have internal predecessors, (173146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41749 states to 41749 states and 173146 transitions. [2021-07-09 18:32:23,554 INFO L78 Accepts]: Start accepts. Automaton has 41749 states and 173146 transitions. Word has length 39 [2021-07-09 18:32:23,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:23,554 INFO L482 AbstractCegarLoop]: Abstraction has 41749 states and 173146 transitions. [2021-07-09 18:32:23,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:23,555 INFO L276 IsEmpty]: Start isEmpty. Operand 41749 states and 173146 transitions. [2021-07-09 18:32:23,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:23,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:23,669 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:23,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-07-09 18:32:23,893 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:23,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:23,894 INFO L82 PathProgramCache]: Analyzing trace with hash -6081193, now seen corresponding path program 100 times [2021-07-09 18:32:23,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:23,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310876882] [2021-07-09 18:32:23,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:24,207 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-07-09 18:32:24,459 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 18:32:24,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:24,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310876882] [2021-07-09 18:32:24,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310876882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:24,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519629416] [2021-07-09 18:32:24,460 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 18:32:24,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:32:24,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:24,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:32:24,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:24,745 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:32:24,745 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:32:24,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:24,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:24,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:24,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-09 18:32:24,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:32:24,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:24,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:24,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:24,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:32:24,868 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 18:32:24,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519629416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:24,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:24,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:32:24,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390065398] [2021-07-09 18:32:24,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:32:24,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:24,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:32:24,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:24,869 INFO L87 Difference]: Start difference. First operand 41749 states and 173146 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:26,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:26,794 INFO L93 Difference]: Finished difference Result 70246 states and 287846 transitions. [2021-07-09 18:32:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:32:26,795 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:26,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:27,374 INFO L225 Difference]: With dead ends: 70246 [2021-07-09 18:32:27,374 INFO L226 Difference]: Without dead ends: 70054 [2021-07-09 18:32:27,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1306.6ms TimeCoverageRelationStatistics Valid=311, Invalid=1411, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:32:27,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70054 states. [2021-07-09 18:32:29,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70054 to 41773. [2021-07-09 18:32:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41773 states, 41772 states have (on average 4.147036292253184) internal successors, (173230), 41772 states have internal predecessors, (173230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:29,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41773 states to 41773 states and 173230 transitions. [2021-07-09 18:32:29,253 INFO L78 Accepts]: Start accepts. Automaton has 41773 states and 173230 transitions. Word has length 39 [2021-07-09 18:32:29,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:29,253 INFO L482 AbstractCegarLoop]: Abstraction has 41773 states and 173230 transitions. [2021-07-09 18:32:29,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:29,253 INFO L276 IsEmpty]: Start isEmpty. Operand 41773 states and 173230 transitions. [2021-07-09 18:32:29,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:29,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:29,365 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:29,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-07-09 18:32:29,567 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:29,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:29,567 INFO L82 PathProgramCache]: Analyzing trace with hash 2143700845, now seen corresponding path program 101 times [2021-07-09 18:32:29,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:29,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099076933] [2021-07-09 18:32:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:29,932 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 18:32:29,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:29,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099076933] [2021-07-09 18:32:29,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099076933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:29,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22227228] [2021-07-09 18:32:29,932 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 18:32:29,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:32:29,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:29,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:32:29,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:30,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:30,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:30,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:30,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:30,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-07-09 18:32:30,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:32:30,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:30,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:32:30,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:54 [2021-07-09 18:32:30,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:30,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:30,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:32:30,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:30,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:30,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:32:30,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:27 [2021-07-09 18:32:30,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:30,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:30,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:30,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:30,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-07-09 18:32:30,858 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:30,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:30,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:30,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-09 18:32:30,923 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 18:32:30,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22227228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:30,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:30,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:32:30,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662793585] [2021-07-09 18:32:30,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:32:30,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:30,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:32:30,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:32:30,924 INFO L87 Difference]: Start difference. First operand 41773 states and 173230 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:32,102 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-07-09 18:32:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:35,527 INFO L93 Difference]: Finished difference Result 76909 states and 314617 transitions. [2021-07-09 18:32:35,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:32:35,527 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:35,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:36,202 INFO L225 Difference]: With dead ends: 76909 [2021-07-09 18:32:36,202 INFO L226 Difference]: Without dead ends: 76688 [2021-07-09 18:32:36,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 3185.6ms TimeCoverageRelationStatistics Valid=813, Invalid=4887, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:32:36,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76688 states. [2021-07-09 18:32:37,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76688 to 42250. [2021-07-09 18:32:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42250 states, 42249 states have (on average 4.141447134843428) internal successors, (174972), 42249 states have internal predecessors, (174972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42250 states to 42250 states and 174972 transitions. [2021-07-09 18:32:38,273 INFO L78 Accepts]: Start accepts. Automaton has 42250 states and 174972 transitions. Word has length 39 [2021-07-09 18:32:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:38,273 INFO L482 AbstractCegarLoop]: Abstraction has 42250 states and 174972 transitions. [2021-07-09 18:32:38,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 42250 states and 174972 transitions. [2021-07-09 18:32:38,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:38,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:38,384 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:38,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:38,600 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:38,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:38,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2053917695, now seen corresponding path program 102 times [2021-07-09 18:32:38,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:38,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648419480] [2021-07-09 18:32:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:38,990 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 18:32:38,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:38,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648419480] [2021-07-09 18:32:38,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648419480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:38,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25306666] [2021-07-09 18:32:38,991 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 18:32:39,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:32:39,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:39,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:32:39,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:39,262 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:32:39,262 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:32:39,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:39,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:39,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:39,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-09 18:32:39,674 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-07-09 18:32:39,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:32:39,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:39,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:39,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:39,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:32:39,737 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 18:32:39,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25306666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:39,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:39,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:32:39,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668814551] [2021-07-09 18:32:39,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:32:39,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:39,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:32:39,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:39,738 INFO L87 Difference]: Start difference. First operand 42250 states and 174972 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:41,949 INFO L93 Difference]: Finished difference Result 85820 states and 348935 transitions. [2021-07-09 18:32:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:32:41,949 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:42,605 INFO L225 Difference]: With dead ends: 85820 [2021-07-09 18:32:42,606 INFO L226 Difference]: Without dead ends: 85596 [2021-07-09 18:32:42,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1682.5ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:32:42,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85596 states. [2021-07-09 18:32:44,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85596 to 41959. [2021-07-09 18:32:44,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41959 states, 41958 states have (on average 4.145335812002479) internal successors, (173930), 41958 states have internal predecessors, (173930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:44,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41959 states to 41959 states and 173930 transitions. [2021-07-09 18:32:44,484 INFO L78 Accepts]: Start accepts. Automaton has 41959 states and 173930 transitions. Word has length 39 [2021-07-09 18:32:44,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:44,484 INFO L482 AbstractCegarLoop]: Abstraction has 41959 states and 173930 transitions. [2021-07-09 18:32:44,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:44,484 INFO L276 IsEmpty]: Start isEmpty. Operand 41959 states and 173930 transitions. [2021-07-09 18:32:44,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:44,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:44,582 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:44,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-07-09 18:32:44,798 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:44,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:44,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1820000131, now seen corresponding path program 103 times [2021-07-09 18:32:44,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:44,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106313863] [2021-07-09 18:32:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:45,548 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-07-09 18:32:45,650 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 18:32:45,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:45,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106313863] [2021-07-09 18:32:45,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106313863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:45,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776342244] [2021-07-09 18:32:45,650 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 18:32:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:45,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:32:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:45,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:32:45,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:45,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:45,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:45,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:32:45,963 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:32:45,963 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:32:45,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:45,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:45,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:45,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:32:46,011 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 18:32:46,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776342244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:46,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:46,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:32:46,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220911232] [2021-07-09 18:32:46,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:32:46,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:46,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:32:46,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:46,012 INFO L87 Difference]: Start difference. First operand 41959 states and 173930 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:48,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:48,389 INFO L93 Difference]: Finished difference Result 87518 states and 356426 transitions. [2021-07-09 18:32:48,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:32:48,389 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:48,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:48,835 INFO L225 Difference]: With dead ends: 87518 [2021-07-09 18:32:48,835 INFO L226 Difference]: Without dead ends: 87366 [2021-07-09 18:32:48,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1653.6ms TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:32:48,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87366 states. [2021-07-09 18:32:50,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87366 to 42029. [2021-07-09 18:32:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42029 states, 42028 states have (on average 4.146045493480536) internal successors, (174250), 42028 states have internal predecessors, (174250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42029 states to 42029 states and 174250 transitions. [2021-07-09 18:32:50,951 INFO L78 Accepts]: Start accepts. Automaton has 42029 states and 174250 transitions. Word has length 39 [2021-07-09 18:32:50,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:50,951 INFO L482 AbstractCegarLoop]: Abstraction has 42029 states and 174250 transitions. [2021-07-09 18:32:50,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 42029 states and 174250 transitions. [2021-07-09 18:32:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:51,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:51,067 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:51,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-07-09 18:32:51,281 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:51,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:51,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920877, now seen corresponding path program 104 times [2021-07-09 18:32:51,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:51,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073677002] [2021-07-09 18:32:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:51,580 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-07-09 18:32:51,885 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 18:32:51,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:51,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073677002] [2021-07-09 18:32:51,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073677002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:51,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658759283] [2021-07-09 18:32:51,885 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 18:32:51,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:51,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:51,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:32:51,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:52,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:32:52,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:52,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:32:52,223 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:32:52,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:32:52,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:52,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:52,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:32:52,272 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 18:32:52,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658759283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:52,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:52,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:32:52,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987154283] [2021-07-09 18:32:52,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:32:52,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:52,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:32:52,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:32:52,273 INFO L87 Difference]: Start difference. First operand 42029 states and 174250 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:54,215 INFO L93 Difference]: Finished difference Result 73916 states and 302379 transitions. [2021-07-09 18:32:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:32:54,215 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:32:54,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:54,971 INFO L225 Difference]: With dead ends: 73916 [2021-07-09 18:32:54,971 INFO L226 Difference]: Without dead ends: 73826 [2021-07-09 18:32:54,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1534.5ms TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:32:55,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73826 states. [2021-07-09 18:32:56,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73826 to 41749. [2021-07-09 18:32:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41749 states, 41748 states have (on average 4.147408259078279) internal successors, (173146), 41748 states have internal predecessors, (173146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:56,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41749 states to 41749 states and 173146 transitions. [2021-07-09 18:32:56,616 INFO L78 Accepts]: Start accepts. Automaton has 41749 states and 173146 transitions. Word has length 39 [2021-07-09 18:32:56,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:56,616 INFO L482 AbstractCegarLoop]: Abstraction has 41749 states and 173146 transitions. [2021-07-09 18:32:56,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:56,616 INFO L276 IsEmpty]: Start isEmpty. Operand 41749 states and 173146 transitions. [2021-07-09 18:32:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:32:56,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:56,709 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:56,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-09 18:32:56,925 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:56,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2097565101, now seen corresponding path program 105 times [2021-07-09 18:32:56,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:56,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216004397] [2021-07-09 18:32:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:57,239 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 18:32:57,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:57,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216004397] [2021-07-09 18:32:57,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216004397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:57,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710550916] [2021-07-09 18:32:57,240 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 18:32:57,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:32:57,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:57,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:32:57,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:57,678 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-07-09 18:32:57,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:57,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-09 18:32:57,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:57,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:57,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:57,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:87 [2021-07-09 18:32:57,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:57,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2021-07-09 18:32:57,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:57,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:57,966 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 1 xjuncts. [2021-07-09 18:32:57,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2021-07-09 18:32:58,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:58,034 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:32:58,035 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:58,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:58,057 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 18:32:58,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:47 [2021-07-09 18:32:58,216 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 18:32:58,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710550916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:58,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:58,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-09 18:32:58,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075232010] [2021-07-09 18:32:58,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:32:58,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:58,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:32:58,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:32:58,217 INFO L87 Difference]: Start difference. First operand 41749 states and 173146 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:59,209 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-07-09 18:33:03,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:03,579 INFO L93 Difference]: Finished difference Result 70259 states and 285004 transitions. [2021-07-09 18:33:03,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:33:03,579 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:33:03,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:03,979 INFO L225 Difference]: With dead ends: 70259 [2021-07-09 18:33:03,979 INFO L226 Difference]: Without dead ends: 70111 [2021-07-09 18:33:03,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2422 ImplicationChecksByTransitivity, 4431.3ms TimeCoverageRelationStatistics Valid=1005, Invalid=6651, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:33:04,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70111 states. [2021-07-09 18:33:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70111 to 42185. [2021-07-09 18:33:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42185 states, 42184 states have (on average 4.144130476009861) internal successors, (174816), 42184 states have internal predecessors, (174816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42185 states to 42185 states and 174816 transitions. [2021-07-09 18:33:05,497 INFO L78 Accepts]: Start accepts. Automaton has 42185 states and 174816 transitions. Word has length 39 [2021-07-09 18:33:05,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:05,498 INFO L482 AbstractCegarLoop]: Abstraction has 42185 states and 174816 transitions. [2021-07-09 18:33:05,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:05,498 INFO L276 IsEmpty]: Start isEmpty. Operand 42185 states and 174816 transitions. [2021-07-09 18:33:05,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:33:05,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:05,606 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:05,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:05,819 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:05,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:05,819 INFO L82 PathProgramCache]: Analyzing trace with hash 415728191, now seen corresponding path program 106 times [2021-07-09 18:33:05,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:05,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833676379] [2021-07-09 18:33:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:06,143 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 18:33:06,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:06,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833676379] [2021-07-09 18:33:06,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833676379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:06,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138654711] [2021-07-09 18:33:06,144 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 18:33:06,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:33:06,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:06,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:33:06,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:06,377 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:33:06,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:06,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:06,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:06,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:06,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-07-09 18:33:06,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:33:06,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:06,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:06,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:06,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:33:06,492 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 18:33:06,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138654711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:06,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:06,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:33:06,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853372309] [2021-07-09 18:33:06,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:33:06,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:06,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:33:06,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:33:06,493 INFO L87 Difference]: Start difference. First operand 42185 states and 174816 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:08,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:08,888 INFO L93 Difference]: Finished difference Result 85984 states and 350132 transitions. [2021-07-09 18:33:08,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:33:08,888 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:33:08,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:09,410 INFO L225 Difference]: With dead ends: 85984 [2021-07-09 18:33:09,410 INFO L226 Difference]: Without dead ends: 85768 [2021-07-09 18:33:09,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1344.1ms TimeCoverageRelationStatistics Valid=424, Invalid=2228, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:33:09,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85768 states. [2021-07-09 18:33:11,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85768 to 41935. [2021-07-09 18:33:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41935 states, 41934 states have (on average 4.14837601945915) internal successors, (173958), 41934 states have internal predecessors, (173958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41935 states to 41935 states and 173958 transitions. [2021-07-09 18:33:11,390 INFO L78 Accepts]: Start accepts. Automaton has 41935 states and 173958 transitions. Word has length 39 [2021-07-09 18:33:11,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:11,390 INFO L482 AbstractCegarLoop]: Abstraction has 41935 states and 173958 transitions. [2021-07-09 18:33:11,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:11,390 INFO L276 IsEmpty]: Start isEmpty. Operand 41935 states and 173958 transitions. [2021-07-09 18:33:11,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:33:11,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:11,496 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:11,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-07-09 18:33:11,713 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:11,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:11,713 INFO L82 PathProgramCache]: Analyzing trace with hash -385546579, now seen corresponding path program 107 times [2021-07-09 18:33:11,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:11,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244214818] [2021-07-09 18:33:11,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:12,412 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 18:33:12,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:12,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244214818] [2021-07-09 18:33:12,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244214818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:12,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414499764] [2021-07-09 18:33:12,412 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 18:33:12,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:33:12,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:12,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:33:12,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:12,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:12,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:12,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:12,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:12,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-07-09 18:33:12,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:33:12,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:12,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:33:12,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:45 [2021-07-09 18:33:12,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:12,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:12,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:33:12,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:12,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:12,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:12,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:18 [2021-07-09 18:33:12,998 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 18:33:12,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414499764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:12,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:12,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:33:12,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046729171] [2021-07-09 18:33:12,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:33:12,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:12,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:33:12,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:33:12,999 INFO L87 Difference]: Start difference. First operand 41935 states and 173958 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:15,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:15,989 INFO L93 Difference]: Finished difference Result 67534 states and 276182 transitions. [2021-07-09 18:33:15,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:33:15,989 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:33:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:16,269 INFO L225 Difference]: With dead ends: 67534 [2021-07-09 18:33:16,269 INFO L226 Difference]: Without dead ends: 67424 [2021-07-09 18:33:16,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 2004.5ms TimeCoverageRelationStatistics Valid=420, Invalid=2772, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:33:16,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67424 states. [2021-07-09 18:33:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67424 to 42487. [2021-07-09 18:33:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42487 states, 42486 states have (on average 4.143011815656922) internal successors, (176020), 42486 states have internal predecessors, (176020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:18,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42487 states to 42487 states and 176020 transitions. [2021-07-09 18:33:18,164 INFO L78 Accepts]: Start accepts. Automaton has 42487 states and 176020 transitions. Word has length 39 [2021-07-09 18:33:18,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:18,164 INFO L482 AbstractCegarLoop]: Abstraction has 42487 states and 176020 transitions. [2021-07-09 18:33:18,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:18,164 INFO L276 IsEmpty]: Start isEmpty. Operand 42487 states and 176020 transitions. [2021-07-09 18:33:18,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:33:18,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:18,280 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:18,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:18,496 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:18,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1112077505, now seen corresponding path program 108 times [2021-07-09 18:33:18,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:18,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506933135] [2021-07-09 18:33:18,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:18,792 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 18:33:18,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:18,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506933135] [2021-07-09 18:33:18,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506933135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:18,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280441270] [2021-07-09 18:33:18,792 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 18:33:18,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:33:18,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:18,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:33:18,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:19,032 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:33:19,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:33:19,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:19,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:19,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:19,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:33:19,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:33:19,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:19,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:19,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:19,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:21 [2021-07-09 18:33:19,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:19,163 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:33:19,165 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:19,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:19,173 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 18:33:19,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:33:19,220 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 18:33:19,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280441270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:19,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:19,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:33:19,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557167363] [2021-07-09 18:33:19,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:33:19,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:19,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:33:19,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:33:19,221 INFO L87 Difference]: Start difference. First operand 42487 states and 176020 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:21,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:21,948 INFO L93 Difference]: Finished difference Result 95986 states and 392161 transitions. [2021-07-09 18:33:21,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:33:21,949 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:33:21,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:22,655 INFO L225 Difference]: With dead ends: 95986 [2021-07-09 18:33:22,655 INFO L226 Difference]: Without dead ends: 95876 [2021-07-09 18:33:22,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 1484.7ms TimeCoverageRelationStatistics Valid=618, Invalid=2922, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:33:22,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95876 states. [2021-07-09 18:33:24,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95876 to 42654. [2021-07-09 18:33:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42654 states, 42653 states have (on average 4.144890160129417) internal successors, (176792), 42653 states have internal predecessors, (176792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:24,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42654 states to 42654 states and 176792 transitions. [2021-07-09 18:33:24,446 INFO L78 Accepts]: Start accepts. Automaton has 42654 states and 176792 transitions. Word has length 39 [2021-07-09 18:33:24,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:24,446 INFO L482 AbstractCegarLoop]: Abstraction has 42654 states and 176792 transitions. [2021-07-09 18:33:24,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 42654 states and 176792 transitions. [2021-07-09 18:33:24,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:33:24,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:24,541 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:24,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-07-09 18:33:24,757 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:24,757 INFO L82 PathProgramCache]: Analyzing trace with hash 255965609, now seen corresponding path program 109 times [2021-07-09 18:33:24,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:24,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654057720] [2021-07-09 18:33:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:25,332 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 18:33:25,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:25,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654057720] [2021-07-09 18:33:25,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654057720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:25,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880166974] [2021-07-09 18:33:25,333 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 18:33:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:25,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:33:25,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:25,596 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:33:25,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:33:25,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:25,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:25,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:25,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-09 18:33:25,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:33:25,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:25,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:25,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:25,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:33:25,685 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 18:33:25,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880166974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:25,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:25,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:33:25,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337452658] [2021-07-09 18:33:25,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:33:25,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:25,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:33:25,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:33:25,686 INFO L87 Difference]: Start difference. First operand 42654 states and 176792 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:27,432 INFO L93 Difference]: Finished difference Result 72719 states and 297553 transitions. [2021-07-09 18:33:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:33:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:33:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:28,000 INFO L225 Difference]: With dead ends: 72719 [2021-07-09 18:33:28,000 INFO L226 Difference]: Without dead ends: 72471 [2021-07-09 18:33:28,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1104.9ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:33:28,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72471 states. [2021-07-09 18:33:29,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72471 to 42840. [2021-07-09 18:33:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42840 states, 42839 states have (on average 4.1432339690468964) internal successors, (177492), 42839 states have internal predecessors, (177492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:29,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42840 states to 42840 states and 177492 transitions. [2021-07-09 18:33:29,516 INFO L78 Accepts]: Start accepts. Automaton has 42840 states and 177492 transitions. Word has length 39 [2021-07-09 18:33:29,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:29,516 INFO L482 AbstractCegarLoop]: Abstraction has 42840 states and 177492 transitions. [2021-07-09 18:33:29,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:29,516 INFO L276 IsEmpty]: Start isEmpty. Operand 42840 states and 177492 transitions. [2021-07-09 18:33:29,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:33:29,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:29,615 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:29,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-09 18:33:29,829 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:29,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:29,829 INFO L82 PathProgramCache]: Analyzing trace with hash -381194881, now seen corresponding path program 110 times [2021-07-09 18:33:29,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:29,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302206475] [2021-07-09 18:33:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:30,146 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 18:33:30,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:30,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302206475] [2021-07-09 18:33:30,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302206475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:30,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479039741] [2021-07-09 18:33:30,146 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 18:33:30,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:33:30,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:30,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:33:30,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:30,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:33:30,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:30,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:30,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:30,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:33:30,672 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:33:30,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:33:30,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:30,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:30,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:30,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:33:30,720 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 18:33:30,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479039741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:30,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:30,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:33:30,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018367132] [2021-07-09 18:33:30,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:33:30,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:30,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:33:30,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:33:30,721 INFO L87 Difference]: Start difference. First operand 42840 states and 177492 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:32,967 INFO L93 Difference]: Finished difference Result 88928 states and 362147 transitions. [2021-07-09 18:33:32,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:33:32,967 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:33:32,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:33,355 INFO L225 Difference]: With dead ends: 88928 [2021-07-09 18:33:33,355 INFO L226 Difference]: Without dead ends: 88760 [2021-07-09 18:33:33,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1354.5ms TimeCoverageRelationStatistics Valid=356, Invalid=1806, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:33:33,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88760 states. [2021-07-09 18:33:34,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88760 to 42910. [2021-07-09 18:33:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42910 states, 42909 states have (on average 4.143932508331585) internal successors, (177812), 42909 states have internal predecessors, (177812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42910 states to 42910 states and 177812 transitions. [2021-07-09 18:33:35,407 INFO L78 Accepts]: Start accepts. Automaton has 42910 states and 177812 transitions. Word has length 39 [2021-07-09 18:33:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:35,408 INFO L482 AbstractCegarLoop]: Abstraction has 42910 states and 177812 transitions. [2021-07-09 18:33:35,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:35,408 INFO L276 IsEmpty]: Start isEmpty. Operand 42910 states and 177812 transitions. [2021-07-09 18:33:35,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:33:35,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:35,520 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:35,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-07-09 18:33:35,736 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:35,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:35,736 INFO L82 PathProgramCache]: Analyzing trace with hash -177274135, now seen corresponding path program 111 times [2021-07-09 18:33:35,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:35,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710501677] [2021-07-09 18:33:35,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:36,057 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 18:33:36,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:36,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710501677] [2021-07-09 18:33:36,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710501677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:36,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061414297] [2021-07-09 18:33:36,058 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 18:33:36,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:33:36,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:36,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:33:36,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:36,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:36,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-07-09 18:33:36,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:36,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:36,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:36,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:72 [2021-07-09 18:33:36,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:36,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:36,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 58 [2021-07-09 18:33:36,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:36,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:36,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:36,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:33:36,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:36,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:36,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:36,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:33:36,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:36,775 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-09 18:33:36,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-09 18:33:36,777 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:36,901 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-07-09 18:33:36,902 INFO L628 ElimStorePlain]: treesize reduction 61, result has 69.8 percent of original size [2021-07-09 18:33:36,911 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 18:33:36,911 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:257, output treesize:187 [2021-07-09 18:33:37,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:37,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:33:37,090 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:37,228 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-07-09 18:33:37,228 INFO L628 ElimStorePlain]: treesize reduction 26, result has 85.7 percent of original size [2021-07-09 18:33:37,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:37,237 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:33:37,238 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:37,359 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-07-09 18:33:37,359 INFO L628 ElimStorePlain]: treesize reduction 10, result has 93.5 percent of original size [2021-07-09 18:33:37,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:37,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:33:37,368 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:37,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:37,434 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 18:33:37,434 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:183, output treesize:150 [2021-07-09 18:33:37,712 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 18:33:37,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061414297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:37,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:37,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-09 18:33:37,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111379298] [2021-07-09 18:33:37,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:33:37,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:37,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:33:37,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:33:37,713 INFO L87 Difference]: Start difference. First operand 42910 states and 177812 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:38,510 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-07-09 18:33:40,226 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-07-09 18:33:40,700 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2021-07-09 18:33:41,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:41,471 INFO L93 Difference]: Finished difference Result 68366 states and 278091 transitions. [2021-07-09 18:33:41,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:33:41,471 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:33:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:41,717 INFO L225 Difference]: With dead ends: 68366 [2021-07-09 18:33:41,718 INFO L226 Difference]: Without dead ends: 68218 [2021-07-09 18:33:41,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 2896.3ms TimeCoverageRelationStatistics Valid=577, Invalid=2963, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:33:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68218 states. [2021-07-09 18:33:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68218 to 42932. [2021-07-09 18:33:43,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42932 states, 42931 states have (on average 4.143765577321749) internal successors, (177896), 42931 states have internal predecessors, (177896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:43,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42932 states to 42932 states and 177896 transitions. [2021-07-09 18:33:43,186 INFO L78 Accepts]: Start accepts. Automaton has 42932 states and 177896 transitions. Word has length 39 [2021-07-09 18:33:43,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:43,186 INFO L482 AbstractCegarLoop]: Abstraction has 42932 states and 177896 transitions. [2021-07-09 18:33:43,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:43,186 INFO L276 IsEmpty]: Start isEmpty. Operand 42932 states and 177896 transitions. [2021-07-09 18:33:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:33:43,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:43,298 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:43,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:43,513 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:43,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:43,514 INFO L82 PathProgramCache]: Analyzing trace with hash -655100993, now seen corresponding path program 112 times [2021-07-09 18:33:43,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:43,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068213497] [2021-07-09 18:33:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:43,879 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-07-09 18:33:44,033 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 18:33:44,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:44,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068213497] [2021-07-09 18:33:44,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068213497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:44,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080212859] [2021-07-09 18:33:44,034 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 18:33:44,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:33:44,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:44,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:33:44,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:44,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:33:44,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:44,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:44,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:44,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:33:44,334 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:33:44,334 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:33:44,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:44,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:44,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:44,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:33:44,383 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 18:33:44,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080212859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:44,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:44,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:33:44,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721747495] [2021-07-09 18:33:44,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:33:44,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:44,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:33:44,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:33:44,384 INFO L87 Difference]: Start difference. First operand 42932 states and 177896 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:46,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:46,650 INFO L93 Difference]: Finished difference Result 89444 states and 364653 transitions. [2021-07-09 18:33:46,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:33:46,650 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:33:46,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:47,000 INFO L225 Difference]: With dead ends: 89444 [2021-07-09 18:33:47,000 INFO L226 Difference]: Without dead ends: 89362 [2021-07-09 18:33:47,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1344.7ms TimeCoverageRelationStatistics Valid=332, Invalid=1738, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:33:47,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89362 states. [2021-07-09 18:33:48,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89362 to 42654. [2021-07-09 18:33:48,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42654 states, 42653 states have (on average 4.144890160129417) internal successors, (176792), 42653 states have internal predecessors, (176792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42654 states to 42654 states and 176792 transitions. [2021-07-09 18:33:48,654 INFO L78 Accepts]: Start accepts. Automaton has 42654 states and 176792 transitions. Word has length 39 [2021-07-09 18:33:48,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:48,654 INFO L482 AbstractCegarLoop]: Abstraction has 42654 states and 176792 transitions. [2021-07-09 18:33:48,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 42654 states and 176792 transitions. [2021-07-09 18:33:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:33:49,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:49,042 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:49,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-07-09 18:33:49,257 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:49,258 INFO L82 PathProgramCache]: Analyzing trace with hash -886720207, now seen corresponding path program 113 times [2021-07-09 18:33:49,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:49,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839425619] [2021-07-09 18:33:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:49,525 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 18:33:49,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:49,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839425619] [2021-07-09 18:33:49,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839425619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:49,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200467138] [2021-07-09 18:33:49,525 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 18:33:49,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:33:49,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:49,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:33:49,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:49,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:49,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-09 18:33:49,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:49,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:49,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:49,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:95 [2021-07-09 18:33:49,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:49,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:49,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:49,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:49,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 52 [2021-07-09 18:33:49,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:33:49,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:49,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:49,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:50,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:50,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 54 [2021-07-09 18:33:50,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:33:50,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:50,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:50,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-07-09 18:33:50,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:50,089 INFO L628 ElimStorePlain]: treesize reduction 7, result has 91.4 percent of original size [2021-07-09 18:33:50,092 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 18:33:50,092 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:136, output treesize:69 [2021-07-09 18:33:50,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:50,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:33:50,210 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:50,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:50,218 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 18:33:50,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-09 18:33:50,270 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 18:33:50,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200467138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:50,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:50,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-09 18:33:50,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833485482] [2021-07-09 18:33:50,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:33:50,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:33:50,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:33:50,271 INFO L87 Difference]: Start difference. First operand 42654 states and 176792 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:54,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:54,025 INFO L93 Difference]: Finished difference Result 72106 states and 295021 transitions. [2021-07-09 18:33:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:33:54,026 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:33:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:54,358 INFO L225 Difference]: With dead ends: 72106 [2021-07-09 18:33:54,359 INFO L226 Difference]: Without dead ends: 71996 [2021-07-09 18:33:54,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 2469.5ms TimeCoverageRelationStatistics Valid=599, Invalid=3561, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:33:54,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71996 states. [2021-07-09 18:33:55,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71996 to 42878. [2021-07-09 18:33:55,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42878 states, 42877 states have (on average 4.144296475966136) internal successors, (177695), 42877 states have internal predecessors, (177695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:56,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42878 states to 42878 states and 177695 transitions. [2021-07-09 18:33:56,151 INFO L78 Accepts]: Start accepts. Automaton has 42878 states and 177695 transitions. Word has length 39 [2021-07-09 18:33:56,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:56,151 INFO L482 AbstractCegarLoop]: Abstraction has 42878 states and 177695 transitions. [2021-07-09 18:33:56,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:56,151 INFO L276 IsEmpty]: Start isEmpty. Operand 42878 states and 177695 transitions. [2021-07-09 18:33:56,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:33:56,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:56,269 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:56,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable558,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:56,476 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:56,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:56,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1729406393, now seen corresponding path program 114 times [2021-07-09 18:33:56,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:56,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217839844] [2021-07-09 18:33:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:57,102 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 18:33:57,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:57,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217839844] [2021-07-09 18:33:57,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217839844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:57,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139060168] [2021-07-09 18:33:57,103 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 18:33:57,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:33:57,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:57,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:33:57,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:57,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-07-09 18:33:57,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:57,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:57,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:57,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-07-09 18:33:57,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:57,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:57,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-07-09 18:33:57,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:57,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:57,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:57,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:12 [2021-07-09 18:33:57,469 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 18:33:57,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139060168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:57,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:57,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:33:57,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110017221] [2021-07-09 18:33:57,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:33:57,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:57,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:33:57,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:33:57,470 INFO L87 Difference]: Start difference. First operand 42878 states and 177695 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:00,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:00,049 INFO L93 Difference]: Finished difference Result 93481 states and 381991 transitions. [2021-07-09 18:34:00,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:34:00,049 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:34:00,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:00,638 INFO L225 Difference]: With dead ends: 93481 [2021-07-09 18:34:00,638 INFO L226 Difference]: Without dead ends: 93426 [2021-07-09 18:34:00,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1665.3ms TimeCoverageRelationStatistics Valid=377, Invalid=1879, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:34:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93426 states. [2021-07-09 18:34:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93426 to 43171. [2021-07-09 18:34:02,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43171 states, 43170 states have (on average 4.145564049108177) internal successors, (178964), 43170 states have internal predecessors, (178964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43171 states to 43171 states and 178964 transitions. [2021-07-09 18:34:03,257 INFO L78 Accepts]: Start accepts. Automaton has 43171 states and 178964 transitions. Word has length 39 [2021-07-09 18:34:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:03,257 INFO L482 AbstractCegarLoop]: Abstraction has 43171 states and 178964 transitions. [2021-07-09 18:34:03,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:03,257 INFO L276 IsEmpty]: Start isEmpty. Operand 43171 states and 178964 transitions. [2021-07-09 18:34:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:34:03,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:03,374 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:03,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:03,591 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:03,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:03,591 INFO L82 PathProgramCache]: Analyzing trace with hash 470021165, now seen corresponding path program 115 times [2021-07-09 18:34:03,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:03,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758425925] [2021-07-09 18:34:03,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:03,878 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 18:34:03,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:03,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758425925] [2021-07-09 18:34:03,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758425925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:03,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351776656] [2021-07-09 18:34:03,878 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 18:34:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:03,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:34:03,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:04,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:34:04,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:04,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:04,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:04,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:34:04,207 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:34:04,208 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:34:04,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:04,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:04,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:04,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:34:04,254 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 18:34:04,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351776656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:04,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:04,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:34:04,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468647922] [2021-07-09 18:34:04,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:34:04,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:04,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:34:04,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:34:04,255 INFO L87 Difference]: Start difference. First operand 43171 states and 178964 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:06,253 INFO L93 Difference]: Finished difference Result 78544 states and 323065 transitions. [2021-07-09 18:34:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:34:06,253 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:34:06,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:06,610 INFO L225 Difference]: With dead ends: 78544 [2021-07-09 18:34:06,611 INFO L226 Difference]: Without dead ends: 78489 [2021-07-09 18:34:06,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 833.8ms TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:34:06,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78489 states. [2021-07-09 18:34:08,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78489 to 43683. [2021-07-09 18:34:08,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43683 states, 43682 states have (on average 4.147474932466462) internal successors, (181170), 43682 states have internal predecessors, (181170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43683 states to 43683 states and 181170 transitions. [2021-07-09 18:34:08,405 INFO L78 Accepts]: Start accepts. Automaton has 43683 states and 181170 transitions. Word has length 39 [2021-07-09 18:34:08,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:08,405 INFO L482 AbstractCegarLoop]: Abstraction has 43683 states and 181170 transitions. [2021-07-09 18:34:08,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 43683 states and 181170 transitions. [2021-07-09 18:34:08,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:34:08,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:08,517 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:08,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:08,733 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:08,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:08,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1959373289, now seen corresponding path program 116 times [2021-07-09 18:34:08,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:08,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472072374] [2021-07-09 18:34:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:09,206 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 18:34:09,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:09,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472072374] [2021-07-09 18:34:09,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472072374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:09,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723769426] [2021-07-09 18:34:09,206 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 18:34:09,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:09,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:09,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:34:09,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:09,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:34:09,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:09,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:09,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:09,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-09 18:34:09,457 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:34:09,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:34:09,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:09,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:09,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:09,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:34:09,496 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 18:34:09,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723769426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:09,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:09,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:34:09,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123213077] [2021-07-09 18:34:09,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:34:09,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:09,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:34:09,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:34:09,497 INFO L87 Difference]: Start difference. First operand 43683 states and 181170 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:11,125 INFO L93 Difference]: Finished difference Result 77744 states and 319860 transitions. [2021-07-09 18:34:11,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:34:11,126 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:34:11,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:11,870 INFO L225 Difference]: With dead ends: 77744 [2021-07-09 18:34:11,870 INFO L226 Difference]: Without dead ends: 77689 [2021-07-09 18:34:11,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 737.7ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:34:11,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77689 states. [2021-07-09 18:34:13,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77689 to 42799. [2021-07-09 18:34:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42799 states, 42798 states have (on average 4.1445861956166175) internal successors, (177380), 42798 states have internal predecessors, (177380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42799 states to 42799 states and 177380 transitions. [2021-07-09 18:34:13,715 INFO L78 Accepts]: Start accepts. Automaton has 42799 states and 177380 transitions. Word has length 39 [2021-07-09 18:34:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:13,715 INFO L482 AbstractCegarLoop]: Abstraction has 42799 states and 177380 transitions. [2021-07-09 18:34:13,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 42799 states and 177380 transitions. [2021-07-09 18:34:13,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:34:13,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:13,828 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:14,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-07-09 18:34:14,041 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:14,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:14,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1581231163, now seen corresponding path program 117 times [2021-07-09 18:34:14,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:14,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102426979] [2021-07-09 18:34:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:14,352 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 18:34:14,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:14,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102426979] [2021-07-09 18:34:14,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102426979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:14,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398578388] [2021-07-09 18:34:14,353 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 18:34:14,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:34:14,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:14,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:34:14,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:14,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:14,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:14,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-09 18:34:14,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:14,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:14,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:14,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:91 [2021-07-09 18:34:14,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:34:14,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:14,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:14,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:14,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:34:15,003 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 18:34:15,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398578388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:15,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:15,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:34:15,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961340558] [2021-07-09 18:34:15,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:34:15,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:15,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:34:15,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:34:15,004 INFO L87 Difference]: Start difference. First operand 42799 states and 177380 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:17,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:17,196 INFO L93 Difference]: Finished difference Result 71861 states and 293569 transitions. [2021-07-09 18:34:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:34:17,196 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:34:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:17,617 INFO L225 Difference]: With dead ends: 71861 [2021-07-09 18:34:17,618 INFO L226 Difference]: Without dead ends: 71733 [2021-07-09 18:34:17,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1311.0ms TimeCoverageRelationStatistics Valid=375, Invalid=1787, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:34:17,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71733 states. [2021-07-09 18:34:19,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71733 to 43202. [2021-07-09 18:34:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43202 states, 43201 states have (on average 4.14057544964237) internal successors, (178877), 43201 states have internal predecessors, (178877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:19,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43202 states to 43202 states and 178877 transitions. [2021-07-09 18:34:19,338 INFO L78 Accepts]: Start accepts. Automaton has 43202 states and 178877 transitions. Word has length 39 [2021-07-09 18:34:19,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:19,338 INFO L482 AbstractCegarLoop]: Abstraction has 43202 states and 178877 transitions. [2021-07-09 18:34:19,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:19,338 INFO L276 IsEmpty]: Start isEmpty. Operand 43202 states and 178877 transitions. [2021-07-09 18:34:19,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:34:19,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:19,433 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:19,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-07-09 18:34:19,649 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:19,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:19,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1347313599, now seen corresponding path program 118 times [2021-07-09 18:34:19,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:19,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981966342] [2021-07-09 18:34:19,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:19,965 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 18:34:19,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:19,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981966342] [2021-07-09 18:34:19,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981966342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:19,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747852351] [2021-07-09 18:34:19,965 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 18:34:19,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:19,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:19,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:34:19,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:20,392 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:34:20,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:20,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:20,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:20,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:20,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:34:20,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:34:20,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:20,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:20,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:20,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:34:20,551 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 18:34:20,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747852351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:20,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:20,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:34:20,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653785368] [2021-07-09 18:34:20,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:34:20,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:20,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:34:20,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:34:20,552 INFO L87 Difference]: Start difference. First operand 43202 states and 178877 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:23,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:23,310 INFO L93 Difference]: Finished difference Result 75105 states and 307226 transitions. [2021-07-09 18:34:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:34:23,310 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:34:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:23,721 INFO L225 Difference]: With dead ends: 75105 [2021-07-09 18:34:23,721 INFO L226 Difference]: Without dead ends: 74889 [2021-07-09 18:34:23,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1570.3ms TimeCoverageRelationStatistics Valid=426, Invalid=1830, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:34:23,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74889 states. [2021-07-09 18:34:25,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74889 to 43264. [2021-07-09 18:34:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43264 states, 43263 states have (on average 4.141668400249636) internal successors, (179181), 43263 states have internal predecessors, (179181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:25,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43264 states to 43264 states and 179181 transitions. [2021-07-09 18:34:25,602 INFO L78 Accepts]: Start accepts. Automaton has 43264 states and 179181 transitions. Word has length 39 [2021-07-09 18:34:25,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:25,602 INFO L482 AbstractCegarLoop]: Abstraction has 43264 states and 179181 transitions. [2021-07-09 18:34:25,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:25,602 INFO L276 IsEmpty]: Start isEmpty. Operand 43264 states and 179181 transitions. [2021-07-09 18:34:25,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:34:25,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:25,700 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:25,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:25,916 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:25,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:25,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1135798081, now seen corresponding path program 119 times [2021-07-09 18:34:25,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:25,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763887169] [2021-07-09 18:34:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:26,477 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 18:34:26,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:26,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763887169] [2021-07-09 18:34:26,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763887169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:26,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535053412] [2021-07-09 18:34:26,477 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 18:34:26,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:34:26,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:26,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:34:26,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:26,759 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:34:26,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:26,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:26,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:26,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:26,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-07-09 18:34:26,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:26,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:26,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:34:26,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:26,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:26,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:26,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:18 [2021-07-09 18:34:26,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:34:26,940 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 11 treesize of output 5 [2021-07-09 18:34:26,941 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:34:26,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:26,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:26,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-07-09 18:34:26,970 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 18:34:26,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535053412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:26,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:26,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-09 18:34:26,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893337565] [2021-07-09 18:34:26,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:34:26,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:26,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:34:26,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:34:26,972 INFO L87 Difference]: Start difference. First operand 43264 states and 179181 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:28,069 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-07-09 18:34:30,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:30,079 INFO L93 Difference]: Finished difference Result 69582 states and 284361 transitions. [2021-07-09 18:34:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:34:30,080 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:34:30,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:30,331 INFO L225 Difference]: With dead ends: 69582 [2021-07-09 18:34:30,331 INFO L226 Difference]: Without dead ends: 69527 [2021-07-09 18:34:30,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 2238.8ms TimeCoverageRelationStatistics Valid=559, Invalid=2981, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:34:30,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69527 states. [2021-07-09 18:34:31,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69527 to 43738. [2021-07-09 18:34:31,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43738 states, 43737 states have (on average 4.138395408921508) internal successors, (181001), 43737 states have internal predecessors, (181001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:32,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43738 states to 43738 states and 181001 transitions. [2021-07-09 18:34:32,373 INFO L78 Accepts]: Start accepts. Automaton has 43738 states and 181001 transitions. Word has length 39 [2021-07-09 18:34:32,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:32,373 INFO L482 AbstractCegarLoop]: Abstraction has 43738 states and 181001 transitions. [2021-07-09 18:34:32,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:32,374 INFO L276 IsEmpty]: Start isEmpty. Operand 43738 states and 181001 transitions. [2021-07-09 18:34:32,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:34:32,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:32,503 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:32,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:32,717 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:32,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:32,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1390277773, now seen corresponding path program 120 times [2021-07-09 18:34:32,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:32,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591377296] [2021-07-09 18:34:32,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:33,021 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 18:34:33,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:33,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591377296] [2021-07-09 18:34:33,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591377296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:33,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597839611] [2021-07-09 18:34:33,021 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 18:34:33,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:34:33,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:33,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:34:33,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:33,210 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:34:33,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:34:33,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:33,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:33,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:33,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:34:33,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:34:33,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:33,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:33,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:33,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:34:33,349 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 18:34:33,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597839611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:33,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:33,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:34:33,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942237273] [2021-07-09 18:34:33,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:34:33,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:33,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:34:33,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:34:33,350 INFO L87 Difference]: Start difference. First operand 43738 states and 181001 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:35,507 INFO L93 Difference]: Finished difference Result 89603 states and 364225 transitions. [2021-07-09 18:34:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:34:35,507 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:34:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:35,915 INFO L225 Difference]: With dead ends: 89603 [2021-07-09 18:34:35,916 INFO L226 Difference]: Without dead ends: 89419 [2021-07-09 18:34:35,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1149.2ms TimeCoverageRelationStatistics Valid=391, Invalid=1865, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:34:36,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89419 states. [2021-07-09 18:34:37,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89419 to 43482. [2021-07-09 18:34:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43482 states, 43481 states have (on average 4.141602079069019) internal successors, (180081), 43481 states have internal predecessors, (180081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:38,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43482 states to 43482 states and 180081 transitions. [2021-07-09 18:34:38,160 INFO L78 Accepts]: Start accepts. Automaton has 43482 states and 180081 transitions. Word has length 39 [2021-07-09 18:34:38,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:38,160 INFO L482 AbstractCegarLoop]: Abstraction has 43482 states and 180081 transitions. [2021-07-09 18:34:38,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:38,161 INFO L276 IsEmpty]: Start isEmpty. Operand 43482 states and 180081 transitions. [2021-07-09 18:34:38,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:34:38,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:38,268 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:38,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:38,484 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:38,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:38,484 INFO L82 PathProgramCache]: Analyzing trace with hash 731015265, now seen corresponding path program 121 times [2021-07-09 18:34:38,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:38,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780413342] [2021-07-09 18:34:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:38,781 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 18:34:38,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:38,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780413342] [2021-07-09 18:34:38,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780413342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:38,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050252556] [2021-07-09 18:34:38,782 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 18:34:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:38,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:34:38,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:39,002 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:34:39,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:34:39,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:39,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:39,181 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-07-09 18:34:39,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:39,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-09 18:34:39,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:34:39,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:39,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:39,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:39,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:34:39,314 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 18:34:39,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050252556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:39,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:39,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:34:39,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255907819] [2021-07-09 18:34:39,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:34:39,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:39,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:34:39,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:34:39,315 INFO L87 Difference]: Start difference. First operand 43482 states and 180081 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:41,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:41,078 INFO L93 Difference]: Finished difference Result 74557 states and 304942 transitions. [2021-07-09 18:34:41,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:34:41,078 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:34:41,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:41,711 INFO L225 Difference]: With dead ends: 74557 [2021-07-09 18:34:41,711 INFO L226 Difference]: Without dead ends: 74365 [2021-07-09 18:34:41,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1102.1ms TimeCoverageRelationStatistics Valid=347, Invalid=1545, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:34:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74365 states. [2021-07-09 18:34:42,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74365 to 43484. [2021-07-09 18:34:43,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43484 states, 43483 states have (on average 4.141319596164018) internal successors, (180077), 43483 states have internal predecessors, (180077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:43,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43484 states to 43484 states and 180077 transitions. [2021-07-09 18:34:43,355 INFO L78 Accepts]: Start accepts. Automaton has 43484 states and 180077 transitions. Word has length 39 [2021-07-09 18:34:43,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:43,355 INFO L482 AbstractCegarLoop]: Abstraction has 43484 states and 180077 transitions. [2021-07-09 18:34:43,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:43,355 INFO L276 IsEmpty]: Start isEmpty. Operand 43484 states and 180077 transitions. [2021-07-09 18:34:43,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:34:43,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:43,480 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:43,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:43,697 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:43,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:43,698 INFO L82 PathProgramCache]: Analyzing trace with hash -971345865, now seen corresponding path program 122 times [2021-07-09 18:34:43,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:43,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202233923] [2021-07-09 18:34:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:44,042 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 18:34:44,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:44,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202233923] [2021-07-09 18:34:44,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202233923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:44,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507619403] [2021-07-09 18:34:44,043 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 18:34:44,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:34:44,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:44,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:34:44,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:44,298 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:34:44,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:34:44,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:44,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-09 18:34:44,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:34:44,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:44,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:44,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:34:44,375 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 18:34:44,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507619403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:44,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:44,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:34:44,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868767208] [2021-07-09 18:34:44,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:34:44,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:44,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:34:44,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:34:44,566 INFO L87 Difference]: Start difference. First operand 43484 states and 180077 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:46,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:46,488 INFO L93 Difference]: Finished difference Result 75702 states and 309410 transitions. [2021-07-09 18:34:46,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:34:46,488 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:34:46,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:46,963 INFO L225 Difference]: With dead ends: 75702 [2021-07-09 18:34:46,963 INFO L226 Difference]: Without dead ends: 75454 [2021-07-09 18:34:46,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1129.0ms TimeCoverageRelationStatistics Valid=372, Invalid=1520, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:34:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75454 states. [2021-07-09 18:34:48,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75454 to 43670. [2021-07-09 18:34:48,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43670 states, 43669 states have (on average 4.139710091827154) internal successors, (180777), 43669 states have internal predecessors, (180777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43670 states to 43670 states and 180777 transitions. [2021-07-09 18:34:48,590 INFO L78 Accepts]: Start accepts. Automaton has 43670 states and 180777 transitions. Word has length 39 [2021-07-09 18:34:48,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:48,590 INFO L482 AbstractCegarLoop]: Abstraction has 43670 states and 180777 transitions. [2021-07-09 18:34:48,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:48,590 INFO L276 IsEmpty]: Start isEmpty. Operand 43670 states and 180777 transitions. [2021-07-09 18:34:48,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:34:48,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:48,691 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:48,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:48,906 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:48,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:48,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1295046579, now seen corresponding path program 123 times [2021-07-09 18:34:48,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:48,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447828315] [2021-07-09 18:34:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:49,255 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 18:34:49,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:49,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447828315] [2021-07-09 18:34:49,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447828315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:49,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761202981] [2021-07-09 18:34:49,256 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 18:34:49,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:34:49,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:49,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:34:49,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:49,722 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-07-09 18:34:49,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-07-09 18:34:49,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:49,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:49,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:49,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:38 [2021-07-09 18:34:49,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:34:49,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:49,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-07-09 18:34:49,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:49,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:49,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:49,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:34 [2021-07-09 18:34:49,872 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 18:34:49,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761202981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:49,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:49,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:34:49,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121133841] [2021-07-09 18:34:49,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:34:49,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:49,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:34:49,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:34:49,875 INFO L87 Difference]: Start difference. First operand 43670 states and 180777 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:51,394 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-07-09 18:34:52,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:52,952 INFO L93 Difference]: Finished difference Result 93373 states and 379077 transitions. [2021-07-09 18:34:52,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:34:52,952 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:34:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:53,371 INFO L225 Difference]: With dead ends: 93373 [2021-07-09 18:34:53,371 INFO L226 Difference]: Without dead ends: 93175 [2021-07-09 18:34:53,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1981.4ms TimeCoverageRelationStatistics Valid=651, Invalid=3381, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:34:53,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93175 states. [2021-07-09 18:34:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93175 to 43870. [2021-07-09 18:34:55,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43870 states, 43869 states have (on average 4.139437871845723) internal successors, (181593), 43869 states have internal predecessors, (181593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:55,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43870 states to 43870 states and 181593 transitions. [2021-07-09 18:34:55,704 INFO L78 Accepts]: Start accepts. Automaton has 43870 states and 181593 transitions. Word has length 39 [2021-07-09 18:34:55,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:34:55,704 INFO L482 AbstractCegarLoop]: Abstraction has 43870 states and 181593 transitions. [2021-07-09 18:34:55,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 43870 states and 181593 transitions. [2021-07-09 18:34:55,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:34:55,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:34:55,817 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:34:56,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:34:56,033 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:34:56,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:34:56,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1091125833, now seen corresponding path program 124 times [2021-07-09 18:34:56,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:34:56,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404034732] [2021-07-09 18:34:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:34:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:34:56,354 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 18:34:56,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:34:56,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404034732] [2021-07-09 18:34:56,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404034732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:56,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104528484] [2021-07-09 18:34:56,355 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 18:34:56,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:34:56,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:34:56,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:34:56,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:34:56,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-09 18:34:56,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:56,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-09 18:34:56,878 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:34:56,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:34:56,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:34:56,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:34:56,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-09 18:34:56,927 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 18:34:56,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104528484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:34:56,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:34:56,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:34:56,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730355644] [2021-07-09 18:34:56,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:34:56,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:34:56,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:34:56,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:34:56,928 INFO L87 Difference]: Start difference. First operand 43870 states and 181593 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:34:58,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:34:58,826 INFO L93 Difference]: Finished difference Result 79013 states and 322519 transitions. [2021-07-09 18:34:58,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:34:58,827 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:34:58,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:34:59,374 INFO L225 Difference]: With dead ends: 79013 [2021-07-09 18:34:59,374 INFO L226 Difference]: Without dead ends: 78923 [2021-07-09 18:34:59,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1077.2ms TimeCoverageRelationStatistics Valid=345, Invalid=1377, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:34:59,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78923 states. [2021-07-09 18:35:00,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78923 to 43958. [2021-07-09 18:35:00,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43958 states, 43957 states have (on average 4.139249721318562) internal successors, (181949), 43957 states have internal predecessors, (181949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43958 states to 43958 states and 181949 transitions. [2021-07-09 18:35:01,169 INFO L78 Accepts]: Start accepts. Automaton has 43958 states and 181949 transitions. Word has length 39 [2021-07-09 18:35:01,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:01,170 INFO L482 AbstractCegarLoop]: Abstraction has 43958 states and 181949 transitions. [2021-07-09 18:35:01,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 43958 states and 181949 transitions. [2021-07-09 18:35:01,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:35:01,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:01,269 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:01,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-07-09 18:35:01,485 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:01,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:01,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1606079539, now seen corresponding path program 125 times [2021-07-09 18:35:01,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:01,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358624235] [2021-07-09 18:35:01,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:01,855 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 18:35:01,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:01,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358624235] [2021-07-09 18:35:01,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358624235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:01,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748106781] [2021-07-09 18:35:01,856 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 18:35:01,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:35:01,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:01,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 18:35:01,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:02,393 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-07-09 18:35:02,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:35:02,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:02,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-09 18:35:02,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:47 [2021-07-09 18:35:02,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:35:02,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:02,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:35:02,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:02,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:35:02,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:7 [2021-07-09 18:35:02,893 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 18:35:02,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748106781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:02,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:02,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-09 18:35:02,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632108057] [2021-07-09 18:35:02,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:35:02,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:02,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:35:02,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:35:02,894 INFO L87 Difference]: Start difference. First operand 43958 states and 181949 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:07,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:07,025 INFO L93 Difference]: Finished difference Result 109434 states and 443832 transitions. [2021-07-09 18:35:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:35:07,026 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:35:07,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:07,609 INFO L225 Difference]: With dead ends: 109434 [2021-07-09 18:35:07,609 INFO L226 Difference]: Without dead ends: 109257 [2021-07-09 18:35:07,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 2531.0ms TimeCoverageRelationStatistics Valid=709, Invalid=3581, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:35:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109257 states. [2021-07-09 18:35:09,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109257 to 43958. [2021-07-09 18:35:09,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43958 states, 43957 states have (on average 4.139249721318562) internal successors, (181949), 43957 states have internal predecessors, (181949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43958 states to 43958 states and 181949 transitions. [2021-07-09 18:35:09,999 INFO L78 Accepts]: Start accepts. Automaton has 43958 states and 181949 transitions. Word has length 39 [2021-07-09 18:35:09,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:09,999 INFO L482 AbstractCegarLoop]: Abstraction has 43958 states and 181949 transitions. [2021-07-09 18:35:09,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:09,999 INFO L276 IsEmpty]: Start isEmpty. Operand 43958 states and 181949 transitions. [2021-07-09 18:35:10,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:35:10,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:10,104 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:10,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-07-09 18:35:10,321 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:10,321 INFO L82 PathProgramCache]: Analyzing trace with hash 794374007, now seen corresponding path program 126 times [2021-07-09 18:35:10,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:10,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504649500] [2021-07-09 18:35:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:10,628 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 18:35:10,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:10,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504649500] [2021-07-09 18:35:10,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504649500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:10,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735299421] [2021-07-09 18:35:10,628 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 18:35:10,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:35:10,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:10,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:35:10,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:10,852 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:35:10,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:10,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:10,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:10,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:35:10,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-07-09 18:35:10,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:35:10,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:10,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:10,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:35:10,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-09 18:35:10,952 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 18:35:10,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735299421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:10,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:10,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:35:10,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643441387] [2021-07-09 18:35:10,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:35:10,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:35:10,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:35:10,953 INFO L87 Difference]: Start difference. First operand 43958 states and 181949 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:13,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:13,501 INFO L93 Difference]: Finished difference Result 80938 states and 332670 transitions. [2021-07-09 18:35:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:35:13,501 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:35:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:14,114 INFO L225 Difference]: With dead ends: 80938 [2021-07-09 18:35:14,114 INFO L226 Difference]: Without dead ends: 80883 [2021-07-09 18:35:14,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1070.2ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:35:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80883 states. [2021-07-09 18:35:15,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80883 to 44232. [2021-07-09 18:35:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44232 states, 44231 states have (on average 4.1383871040672835) internal successors, (183045), 44231 states have internal predecessors, (183045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:15,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44232 states to 44232 states and 183045 transitions. [2021-07-09 18:35:15,884 INFO L78 Accepts]: Start accepts. Automaton has 44232 states and 183045 transitions. Word has length 39 [2021-07-09 18:35:15,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:15,884 INFO L482 AbstractCegarLoop]: Abstraction has 44232 states and 183045 transitions. [2021-07-09 18:35:15,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:15,884 INFO L276 IsEmpty]: Start isEmpty. Operand 44232 states and 183045 transitions. [2021-07-09 18:35:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:35:16,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:16,006 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:16,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-07-09 18:35:16,221 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:16,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:16,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2047487493, now seen corresponding path program 127 times [2021-07-09 18:35:16,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:16,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552291394] [2021-07-09 18:35:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:16,531 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 18:35:16,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:16,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552291394] [2021-07-09 18:35:16,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552291394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:16,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850081473] [2021-07-09 18:35:16,532 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 18:35:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:16,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:35:16,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:16,952 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-07-09 18:35:17,007 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:35:17,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:35:17,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:17,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:17,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:35:17,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-09 18:35:17,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:35:17,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:17,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:17,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:35:17,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:35:17,155 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 18:35:17,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850081473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:17,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:17,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:35:17,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392241016] [2021-07-09 18:35:17,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:35:17,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:17,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:35:17,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:35:17,157 INFO L87 Difference]: Start difference. First operand 44232 states and 183045 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:19,929 INFO L93 Difference]: Finished difference Result 76692 states and 313332 transitions. [2021-07-09 18:35:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:35:19,930 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:35:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:20,382 INFO L225 Difference]: With dead ends: 76692 [2021-07-09 18:35:20,382 INFO L226 Difference]: Without dead ends: 76476 [2021-07-09 18:35:20,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1636.2ms TimeCoverageRelationStatistics Valid=415, Invalid=1841, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:35:20,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76476 states. [2021-07-09 18:35:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76476 to 43876. [2021-07-09 18:35:22,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43876 states, 43875 states have (on average 4.139122507122507) internal successors, (181604), 43875 states have internal predecessors, (181604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43876 states to 43876 states and 181604 transitions. [2021-07-09 18:35:22,327 INFO L78 Accepts]: Start accepts. Automaton has 43876 states and 181604 transitions. Word has length 39 [2021-07-09 18:35:22,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:22,328 INFO L482 AbstractCegarLoop]: Abstraction has 43876 states and 181604 transitions. [2021-07-09 18:35:22,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:22,328 INFO L276 IsEmpty]: Start isEmpty. Operand 43876 states and 181604 transitions. [2021-07-09 18:35:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:35:22,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:22,435 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:22,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-07-09 18:35:22,649 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:22,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:22,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1435886195, now seen corresponding path program 128 times [2021-07-09 18:35:22,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:22,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764483755] [2021-07-09 18:35:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:23,159 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-07-09 18:35:23,285 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 18:35:23,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:23,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764483755] [2021-07-09 18:35:23,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764483755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:23,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788110275] [2021-07-09 18:35:23,285 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 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 18:35:23,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:35:23,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:23,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:35:23,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:23,552 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:35:23,552 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-09 18:35:23,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:23,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:23,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:35:23,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-09 18:35:23,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-09 18:35:23,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:23,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:23,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:35:23,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-09 18:35:23,638 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 18:35:23,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788110275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:23,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:23,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-09 18:35:23,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388252620] [2021-07-09 18:35:23,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:35:23,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:23,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:35:23,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:35:23,640 INFO L87 Difference]: Start difference. First operand 43876 states and 181604 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:24,809 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-07-09 18:35:25,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:35:25,925 INFO L93 Difference]: Finished difference Result 76741 states and 313387 transitions. [2021-07-09 18:35:25,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:35:25,925 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:35:25,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:35:26,253 INFO L225 Difference]: With dead ends: 76741 [2021-07-09 18:35:26,253 INFO L226 Difference]: Without dead ends: 76493 [2021-07-09 18:35:26,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1392.5ms TimeCoverageRelationStatistics Valid=374, Invalid=1606, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:35:26,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76493 states. [2021-07-09 18:35:27,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76493 to 44062. [2021-07-09 18:35:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44062 states, 44061 states have (on average 4.137536596990536) internal successors, (182304), 44061 states have internal predecessors, (182304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:28,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44062 states to 44062 states and 182304 transitions. [2021-07-09 18:35:28,022 INFO L78 Accepts]: Start accepts. Automaton has 44062 states and 182304 transitions. Word has length 39 [2021-07-09 18:35:28,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:35:28,022 INFO L482 AbstractCegarLoop]: Abstraction has 44062 states and 182304 transitions. [2021-07-09 18:35:28,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:35:28,022 INFO L276 IsEmpty]: Start isEmpty. Operand 44062 states and 182304 transitions. [2021-07-09 18:35:28,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:35:28,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:35:28,131 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:35:28,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-07-09 18:35:28,344 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:35:28,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:35:28,344 INFO L82 PathProgramCache]: Analyzing trace with hash 798725705, now seen corresponding path program 129 times [2021-07-09 18:35:28,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:35:28,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135365350] [2021-07-09 18:35:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:35:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:35:28,910 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 18:35:28,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:35:28,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135365350] [2021-07-09 18:35:28,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135365350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:28,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413220384] [2021-07-09 18:35:28,910 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 18:35:28,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:35:28,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:35:28,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:35:28,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:35:29,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:29,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-07-09 18:35:29,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:29,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:29,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:35:29,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:72 [2021-07-09 18:35:29,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:29,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-07-09 18:35:29,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:35:29,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:29,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 39 [2021-07-09 18:35:29,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:29,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:29,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:29,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 58 [2021-07-09 18:35:29,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:29,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:29,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:29,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-09 18:35:29,443 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:29,548 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-09 18:35:29,549 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.5 percent of original size [2021-07-09 18:35:29,555 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 18:35:29,555 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:257, output treesize:197 [2021-07-09 18:35:29,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:29,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-09 18:35:29,765 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:35:29,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:35:29,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:35:29,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-09 18:35:29,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:35:29,824 INFO L628 ElimStorePlain]: treesize reduction 13, result has 77.2 percent of original size [2021-07-09 18:35:29,827 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 18:35:29,827 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:45 [2021-07-09 18:35:29,918 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 18:35:29,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413220384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:35:29,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:35:29,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-09 18:35:29,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731780425] [2021-07-09 18:35:29,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:35:29,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:35:29,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:35:29,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:35:29,920 INFO L87 Difference]: Start difference. First operand 44062 states and 182304 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 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 18:35:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:35:30,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:35:30,660 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:35:30,662 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:35:30,663 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:35:30,664 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:35:30 BasicIcfg [2021-07-09 18:35:30,664 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:35:30,664 INFO L168 Benchmark]: Toolchain (without parser) took 791119.46 ms. Allocated memory was 221.2 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 201.2 MB in the beginning and 3.8 GB in the end (delta: -3.6 GB). Peak memory consumption was 4.2 GB. Max. memory is 8.0 GB. [2021-07-09 18:35:30,664 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 221.2 MB. Free memory is still 202.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:35:30,664 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.80 ms. Allocated memory is still 221.2 MB. Free memory was 201.1 MB in the beginning and 199.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:35:30,664 INFO L168 Benchmark]: Boogie Preprocessor took 19.04 ms. Allocated memory is still 221.2 MB. Free memory was 199.6 MB in the beginning and 198.7 MB in the end (delta: 940.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:35:30,664 INFO L168 Benchmark]: RCFGBuilder took 264.48 ms. Allocated memory is still 221.2 MB. Free memory was 198.6 MB in the beginning and 183.2 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-07-09 18:35:30,664 INFO L168 Benchmark]: TraceAbstraction took 790811.03 ms. Allocated memory was 221.2 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 182.7 MB in the beginning and 3.8 GB in the end (delta: -3.6 GB). Peak memory consumption was 4.1 GB. Max. memory is 8.0 GB. [2021-07-09 18:35:30,664 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 0.09 ms. Allocated memory is still 221.2 MB. Free memory is still 202.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.80 ms. Allocated memory is still 221.2 MB. Free memory was 201.1 MB in the beginning and 199.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.04 ms. Allocated memory is still 221.2 MB. Free memory was 199.6 MB in the beginning and 198.7 MB in the end (delta: 940.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 264.48 ms. Allocated memory is still 221.2 MB. Free memory was 198.6 MB in the beginning and 183.2 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 790811.03 ms. Allocated memory was 221.2 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 182.7 MB in the beginning and 3.8 GB in the end (delta: -3.6 GB). Peak memory consumption was 4.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (44062states) and FLOYD_HOARE automaton (currently 11 states, 34 states before enhancement),while ReachableStatesComputation was computing reachable states (57 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 54 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 790742.7ms, OverallIterations: 138, TraceHistogramMax: 2, EmptinessCheckTime: 16282.3ms, AutomataDifference: 411386.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 87.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9668 SDtfs, 66760 SDslu, 108262 SDs, 0 SdLazy, 198495 SolverSat, 13449 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 101673.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10047 GetRequests, 3499 SyntacticMatches, 126 SemanticMatches, 6422 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112985 ImplicationChecksByTransitivity, 236444.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44232occurred in iteration=135, InterpolantAutomatonStates: 4823, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 214770.2ms AutomataMinimizationTime, 137 MinimizatonAttempts, 4680727 StatesRemovedByMinimization, 137 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 806.1ms SsaConstructionTime, 3152.3ms SatisfiabilityAnalysisTime, 112316.4ms InterpolantComputationTime, 10059 NumberOfCodeBlocks, 10050 NumberOfCodeBlocksAsserted, 487 NumberOfCheckSat, 9791 ConstructedInterpolants, 292 QuantifiedInterpolants, 247224 SizeOfPredicates, 977 NumberOfNonLiveVariables, 14828 ConjunctsInSsa, 5030 ConjunctsInUnsatCore, 268 InterpolantComputations, 11 PerfectInterpolantSequences, 230/4330 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